統計と確率
データ分析、確率分布、仮説検定、統計手法。
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given the following information: p(a) = 0.44 p(b) = 0.22 p(a and b) = 0…
$0.50$
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if you randomly select a card from a well - shuffled standard deck of 5…
$\frac{4}{13}$
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heather buys a bag of cookies that contains 4 chocolate chip cookies, 8…
$9.8\%$
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compute the probability of drawing two clubs from a standard deck of 52…
0.0588 0.0498 0.0045
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suppose a jar contains 18 red marbles and 40 blue marbles. if you reach…
$\frac{51}{551}$
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the function that represents the average cost per person, including tra…
The horizontal asymptote $y = 8$ means the average cost approaches $\$8$ as the number of people increases.
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the root of axillary, axill, is from the latin word for: skin. armpit. …
B. armpit
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jan 8 new 0 0 jan 15 1st quarter 7 0.5 jan 22 full 13 1 jan 30 last qua…
A. $y = 0.508\sin(0.212x + 1.529)-0.512$
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the average number of customers per day at a home improvement store is …
C. 34.081sin(0.888x + 1.341) + 82.822
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5) what changes to your data set would have caused the standard deviati…
Adding data points that are far from the mean of the data - set or increasing the spread of the existing data points (e.g., making the values more spread out from each other) woul…
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consider the following sine regression model $y = 18.614sin(0.521x - 1.…
B. 61.5
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mar 62.4 apr 67.0 may 76.5 jun 83.9 jul 86.8 aug 88.1 sep 79.2 oct 69.9…
b. $y = 20.077\sin(0.500x - 1.959)+67.577$
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4) which data representation would be most useful if someone wanted to …
| Measure | Data Representation | |--|--| | Mean | List of all data values | | Median | Ordered list of data values | | Interquartile Range (IQR) | Box - and - whisker plot |
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your sine regression model for a given problem is y = 0.500 sin(0.222x …
C. $y(95)=0.17$
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a sine curve is periodic. what does this mean? a. the curve goes throug…
A. the curve goes through one cycle and starts over
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plot the data on a scatter plot. produce a sine regression model for th…
d. May not be accurate, information was taken over 2 year period; More information from previous years would help the prediction be more accurate.
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jan 8 new 0 0 jan 15 1st quarter 7 0.5 jan 22 full 13 1 jan 30 last qua…
a. Yes, it shows repeated and periodic behavior.
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the procedure for the passage of legislation in germany is generally wh…
The procedure for the passage of legislation in Germany: It is introduced by the executive, voted on by the Bundestag, and then approved by the Bundesrat. The 5 percent clause mea…
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question 19 1 pts the cabinet is established by the constitution. fixed…
C. comprised of the chief officers of the major executive departments
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10. a sample of musicians was asked to estimate the number of hours spe…
D. mean = 46.3 hours, median = 41.5 hours
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18. as americans, we _____ the great ideals of human freedom expressed …
1. famous 2. antics 3. veered 4. nurtured 5. staunch 6. excess 7. bantered 8. underestimated 9. aspiring 10. venerate 11. masked 12. vindictive 13. roundabout 14. plentiful 15. bu…
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1. in minneapolis, the low temperatures in degrees fahrenheit for nine …
C. Changing the highest temperature from a 12 to a -12 will lower both the mean and the median.
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2. a sample of 250 songs from spotify was analyzed using a special algo…
C. The mean must be 72 since the distribution is skewed to the right.
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5. which one of the following statements is correct? a. the median and …
D. If at least 75% of the observations in a data set have the same value, the IQR must be equal to 0.
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6. a sample of 15 college students was asked to indicate the number of …
D. The 25th percentile is 7.5 because this is the number we get when we order the data and average the values in the 4th and 5th positions.
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10. a sample of musicians was asked to estimate the number of hours spe…
D. mean = 46.3 hours, median = 41.5 hours
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9. in dr. smith’s introductory statistics course, the median final exam…
A. It's possible that no student in the course earned exactly 82 points on the final exam.
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7. a sample of 33 broadway shows was examined. each show was categorize…
C. Less than half of the musicals in the sample have run times above 150 minutes.
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6. a sample of 15 college students was asked to indicate the number of …
D. The 25th percentile is 7.5 because this is the number we get when we order the data and average the values in the 4th and 5th positions.
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6. a sample of 15 college students was asked to indicate the number of …
D. The 25th percentile is 7.5 because this is the number we get when we order the data and average the values in the 4th and 5th positions.
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5. which one of the following statements is correct? a. the median and …
D. If at least 75% of the observations in a data set have the same value, the IQR must be equal to 0.
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the graph shows the exponential regression model for data representing …
The graph of the regression model can be used to predict the population size for any number of years in the future.
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assume that the readings on the thermometers are normally distributed w…
The correct graph is the one where the shaded area to the left of a vertical line (right of the mean) under the normal curve is 0.93. The temperature for $P_{93}$ is approximately…
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assume that a randomly selected subject is given a bone density test. t…
A. (The graph with the shaded region to the right of \(z = 0.38\)) 0.3520
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multiple - choice questions each have five possible answers (a, b, c, d…
$\frac{12}{125}$
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the accompanying table describes the random variable x, the numbers of …
a. 0.026 b. 0.027 c. B. Since the probability of getting 4 or more sleepwalkers is the probability of the given or more extreme result, the result from part (b) is the relevant pr…
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find the area of the shaded region. the graph to the right depicts iq s…
$0.2815$
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find the area of the shaded region. the graph depicts the standard norm…
0.8264
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assume that hybridization experiments are conducted with peas having th…
The result is significantly low, because 13 peas with green pods is less than 15.1 peas.
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assume that different groups of couples use a particular method of gend…
The result is significantly high, because 19 girls is greater than 16.8 girls. A result of 19 girls would suggest that the method is effective.
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fill in the blank. a ______ random variable has infinitely many values …
continuous
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the accompanying table describes results from groups of 8 births from 8…
a. $0.019$ b. $0.023$ c. D. Since getting 0 girls is an even lower number of girls than getting 1 girl, the result from part (b) is the relevant probability. d. A. Yes, since the …
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determine whether the value is a discrete random variable, continuous r…
a. A. It is a discrete random variable. b. A. It is a discrete random variable. c. C. It is not a random variable. d. A. It is a discrete random variable. e. B. It is a continuous…
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use the least - squares regression line of this data set to predict a v…
$45.803$
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this means: example 3 (*fluency practice with pre - requisite) find the…
a. For Example 3: $\frac{3}{4}$; For Example 3 Check: $\frac{7}{12}$ b. For Example 3: $0$; For Example 3 Check: $-\frac{2}{5}$
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3. the ages in years are recorded for a sample of 697 visitors to a mus…
A. It's possible that none of the individuals in the sample were exactly 26 years old.
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voici la compilation des votes pour la présidence de la classe. remplis…
| Choix | Pourcentages (%) | |--|--| | Dorothée | 12.0 | | David | 38.0 | | Juliette | 20.0 | | Derek | 28.0 | | Dylan | 2.0 |
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the ages in years are recorded for a sample of 697 visitors to a museum…
A. It’s possible that none of the individuals in the sample were exactly 26 years old.
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3. the ages in years are recorded for a sample of 697 visitors to a mus…
A. It's possible that none of the individuals in the sample were exactly 26 years old.
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the age of children in kindergarten on the first day of school is unifo…
a. $5.3750$ b. $0.2858$ c. $0.1717$ d. $0.3030$ e. $5.1968$
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2. a sample of 250 songs from spotify was analyzed using a special algo…
C. The mean must be 72 since the distribution is skewed to the right.
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the round off errors when measuring the distance that a long jumper has…
a. 2.2500 b. 1.2990 c. 0.0000 d. 0.5778 e. 0.7778 f. 0.7179 g. 0.8100 h. 1.1250
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describing the properties of polynomial addition. what do the propertie…
The closure property states that the sum of two polynomials is a **polynomial**. The commutative property states that changing the order of two or more terms **does not change** t…
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a sample of 250 songs from spotify was analyzed using a special algorit…
C. The mean must be 72 since the distribution is skewed to the right.
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a bus comes by every 12 minutes. the times from when a person arives at…
a. 6.0000 b. 3.4641 c. 0.3333 d. 0.0707 e. 10.6800
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2. a sample of 250 songs from spotify was analyzed using a special algo…
C. The mean must be 72 since the distribution is skewed to the right.
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below are the probabilities associated with x = number of cancer surviv…
1. The cumulative probability of 2 is 0.85. 2. The probability of no cancer survivors who are centenarians is 0.30. 3. The probability of 3 or more centenarian cancer survivors is…
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1. in minneapolis, the low temperatures in degrees fahrenheit for nine …
C. Changing the highest temperature from a 12 to a -12 will lower both the mean and the median.
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a random number generator picks a number from 4 to 61 in a uniform mann…
a. 32.5 b. 16.4317 c. 0 d. 0.6140 e. 0.7018 f. 0.3043 g. 34.21 h. 46.75
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read the excerpt from my story. here it was, half a century after the f…
the anger black people felt
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question 2 24 pts match the given scenario with the appropriate graphic…
1. scatterplot 2. segmented bar chart 3. box plot 4. side by side boxplot
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free silver meant giving away, for free, silver coins to every american…
1. B. False 2. C. Minting them meant "dancing" around government restrictions on minting coins.
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golden age and ottoman empire quick check summarize why judith herrin b…
Scholars fled with knowledge that sparked the Renaissance in Europe.
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golden age and ottoman empire quick check analyze why the conquering of…
It solidified Islam as a faith and one backed by military support.
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read the excerpt from roll of thunder, hear my cry. t.j. gulped and lea…
The author shows that when T.J. needs help, he turns to a friend he can trust.
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finding inputs and outputs in a story context a local catering company …
The cost for having 20 people served is 215 dollars. The cost for having 6 people served is 89 dollars.
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finding inputs and outputs in a story context you purchase 130 bananas …
The profit from selling 68 bananas is 27.12 dollars. The profit from selling 92 bananas is 41.28 dollars.
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read this paragraph from the dark game. another thing that changed very…
During the Civil War, intelligence was gathered in the same ways it had been gathered in previous wars.
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catalina la grande (1762 - 1796) continuó las políticas de expansión y …
8. Crimea 9. Nakaz 10. nobleza 11. Ilustración 12. la servidumbre 13. c) Una guía para reformas legales 14. b) Promoviendo las artes y la educación 15. d) Se mantuvo y se expandió…
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which is most likely the correlation coefficient for the set of data sh…
-0.83
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the table shows the height, in meters, of an object that is dropped as …
A. According to the line of best fit, the object would have hit the ground 0.6 seconds later than the actual time the object hit the ground.
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the equation for the line of best fit is f(x) ≈ 1.8x - 5.4 for the set …
1. First, substitute \(f(x) = 30\) into the equation \(f(x)=1.8x - 5.4\). We get the equation \(30 = 1.8x-5.4\). 2. Then, add \(5.4\) to both sides of the equation: - \(30 + 5.4=1…
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consider the plot created from the residuals of a line of best fit for …
Yes, the points have no pattern.
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a residual plot is shown. which statements are true about the residual …
- The equation for the line of best fit is not a good approximation for the data because the points have a curved pattern. - The residual plot has the pattern of a curve.
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jace gathered the data in the table. he found the approximate line of b…
-0.86
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directions: drag the tiles to the correct boxes to complete the pairs. …
condolence - feeling of sympathy contemplate - consider, think about discern - make out, understand, hear overwhelming - very strong, intense
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find the equation for the least squares regression line of the data des…
# Explicación: ## Paso 1: Calcular sumatorias Sean $x_i$ el número de palabras y $y_i$ el tiempo en minutos. Sea $n = 6$. Calculamos $\sum_{i = 1}^{n}x_i=1998 + 3538+3553 + 4669+5…
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maura has noticed that her bike ride to work takes longer on some days …
2.222
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find the equation for the least squares regression line of the data des…
$y=-2.122x + 51.511$
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read the following description of a data set. a reporter for a college …
# Explicación: ## Paso 1: Sustituir el valor de x Dado que $x = 9221$, sustituimos en la ecuación $y = 0.311x-1856.997$. $y=0.311\times9221 - 1856.997$ ## Paso 2: Realizar la mult…
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which of the following is an example of an algebraic expression? * 4x +…
First question: $7x - 2y + 1$ Second question: $116$
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read the following description of a data set. melissa is a programmer i…
# Explicación: ## Paso 1: Identificar la ecuación de la recta La ecuación de la recta de regresión es $y = 2.423x+88.361$. ## Paso 2: Sustituir el valor de $x$ Sustituimos $x = 4.…
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read the following description of a data set. a large property develope…
59
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look at the graph below. calculate the standard deviation from the numb…
24
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look at the graph below. find the mean from the graph and enter that nu…
65
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how to read normal graphs: look at the graphs shown below and choose th…
Graph A: $\mu = 6,\sigma = 2$; Graph B: $\mu = 10,\sigma = 1$; Graph C: $\mu = 14,\sigma = 1.5$
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z - scores: in the previous 2 problems you saw that the areas to the le…
The z - scores are exactly the same for \(X = 501\) (elephant) and \(X = 254\) (human).
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z - scores: for human pregnancies, the population mean μ = 266 days and…
$-0.75$
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z - scores: in notes 5.1, exercise 4 at the bottom of the page, we shad…
$-0.75$
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read the following description of a data set. lunas baseball card colle…
# Explicación: ## Paso 1: Identificar el valor de x Dado que el conjunto tiene 16 años, entonces $x = 16$. ## Paso 2: Sustituir x en la ecuación de la línea de regresión Sustituim…
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read the following description of a data set. camille manages the stude…
# Explicación: ## Paso1: Sustituir el valor de x Sustituimos x = 15 en la ecuación $y = 0.043x+2.469$. $y=0.043\times15 + 2.469$ ## Paso2: Realizar la multiplicación Calculamos $0…
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read the following description of a data set. a bumper sticker company …
# Explicación: ## Paso 1: Identificar la variable x La variable x representa el número de miembros en el hogar. Aquí, x = 8. ## Paso 2: Sustituir x en la ecuación de regresión Sus…
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andres signed up for a streaming music service where theres a fixed cos…
The total cost to download 1 song is $5.74.
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subject - verb agreement: 7th grade worksheet subject - verb agreement …
1. b) The students walk to class. 2. c) sleeps 3. b) She writes letters every week. 4. b) plays 5. b) The birds sing in the morning.
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a somber mood settled over many of the early - morning arrivals tuesday…
A. melancholy
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to do so is an obvious politicization of the air - quality standard - s…
B. produced in a particular country
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explicit has the same or almost the same meaning as: literal secular te…
A. literal
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comprise has the same or almost the same meaning as: funnel incorporate…
B. incorporate
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impede means to: prove to be false or incorrect be a hindrance or obsta…
B. be a hindrance or obstacle to
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the red cloak was the perfect way to brighten up my somber black outfit…
A. drab