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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football passing statistics the scatterplot and trend line show the num…
Point 1: \((236,2855)\), Point 2: \((245,2860)\)
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determine whether the following statement is true or false. if the stat…
A. The statement is false. The true statement is "If an event cannot occur, its probability is 0"
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a. find the probability of getting exactly 6 girls in 8 births. .117 (t…
a. \(0.117\) b. \(0.142\) d. B. No, since the appropriate probability is greater than \(0.05\), it is not a significantly high number.
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determine whether the statement is true or false. if the statement is f…
C. This statement is true.
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as part of a survey, a marketing representative asks a random sample of…
D. With \(99\%\) confidence, you can say that the population variance is between \(6950743\) and \(30075903\)
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the accompanying table describes results from groups of 8 births from 8…
a. \(0.117\) b. \(0.142\) c. A. The result from part b, since it is the probability of the given or more extreme result.
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the accompanying table describes results from groups of 8 births from 8…
a. \(0.117\) b. \(0.142\)
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fill in the blank so that the resulting statement is true. a standard b…
A standard bridge deck has \(52\) cards with four suits. \(Hearts\) and \(Diamonds\) are red, and \(Clubs\) and \(Spades\) are black.
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a. find the probability of getting exactly 6 girls in 8 births. (type a…
\(0.117\)
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fill in the blank so that the resulting statement is true. the theoreti…
The theoretical probability of event \(E\), denoted by \(P(E)\), is the number of outcomes in \(E\) divided by total number of possible outcomes.
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the accompanying table lists probabilities for the corresponding number…
D. The random variable is \(x\), which is the number of unlicensed software packages. The possible values of \(x\) are 0, 1, 2, and 3. The values of the random value \(x\) are num…
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the scatterplot shows how many pass attempts and yards a quarterback ha…
\(3\)
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fill in the blank so that the resulting statement is true. the set of a…
sample space
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d. is the time it takes for a light bulb to burn out a discrete random …
d. C. It is a continuous random variable. e. A. It is a discrete random variable. f. B. It is a continuous random variable.
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c. is the eye color of people on commercial aircraft flights a discrete…
c. C. It is not a random variable. d. B. It is a continuous random variable. e. A. It is a discrete random variable.
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a. it is a continuous random variable. b. is the number of light bulbs …
b. A. It is a discrete random variable. c. C. It is not a random variable. d. B. It is a continuous random variable.
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determine whether the value is a discrete random variable, continuous r…
a. Continuous random variable. b. Discrete random variable. c. Not a random variable. d. Continuous random variable. e. Discrete random variable. f. Continuous random variable.
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a. is the amount of rain in city b during april a discrete random varia…
a. A. It is a continuous random variable. b. A. It is a discrete random variable. c. C. It is not a random variable.
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9. the average price of a gallon of gas from 2011 - 2014 is shown in th…
\(3.40\) (rounded to the nearest cent)
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a. is the amount of rain in city b during april a discrete random varia…
a. A. It is a continuous random variable. b. A. It is a discrete random variable.
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the senate in a certain state is comprised of 51 republicans, 46 democr…
\(21553875\)
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a. is the amount of rain in city b during april a discrete random varia…
A. It is a continuous random variable.
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\certainly not,\ agreed the inventor, \which is why i... oh, its backwa…
The inventor assumes he is smarter and more capable than the robot.
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determine whether the value is a discrete random variable, continuous r…
a. Continuous random variable b. Discrete random variable c. Not a random variable d. Continuous random variable e. Discrete random variable f. Continuous random variable
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you volunteer to help drive children at a charity event to the zoo, but…
\(38760\)
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as part of a survey, a marketing representative asks a random sample of…
\((6253741,29126250)\)
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which two points should the line of best fit go through to best represe…
\((1,16)\) and \((6,1)\)
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the table shows the weight of a dog in pounds at various ages in months…
First option: \(x:3,4,6,8,9,12\); \(y:2,5,7,10,11,15\)
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is the random variable given in the accompanying table discrete or cont…
The random variable is discrete. It is discrete because the number of girls \(x\) (values \(0,1,2,3,4\)) is a countable set of values.
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serena says that if a regression line is drawn correctly in a scatterpl…
a scatterplot with an odd number of points in which the correct regression line passes directly through \(0\) of the points
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a bookstore tracked the data of the weight of their deliveries and the …
A box with 10 books should weigh about 6 pounds.
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the equation of the line is ( yapprox - 1.02x + 7.09 ). using the line,…
She forgot the minus sign before the first term on the right side of the equation when she predicted \(y\).
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the equation of the line is ( yapprox - 1.02x + 7.09 ). using the line,…
She plugged \(0.5\) into the equation for \(y\) instead of \(x\) and actually predicted \(x\) instead of \(y\).
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6 2 8 3 10 1.75 time (days) growth (inches) 2 1 3 1.5 4 2.75 5 2 6 2 8 …
\((2,1)\) and \((5,2)\)
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as part of a survey, a marketing representative asks a random sample of…
\((6253700,29126200)\)
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which step comes last when using the divide - center method to find the…
Connect the two centers to produce the trend line.
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when a trend line is drawn on a scatterplot, there are 4 points above t…
C. 4
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as part of a water quality survey, you test the water hardness in sever…
B. With 99% confidence, you can say that the population standard deviation is between 10.1 and 22.1 grains per gallon.
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find e if e = \\sum x \\cdot p(x). e = \\square (simplify your answer. …
\(0.99\)
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check here for instructional material to complete this problem. does \\…
A. Yes, $\sum P(x)=1$.
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does \\( \\sum p(x)=1 \\) ? select the correct choice below and, if nec…
A. No, $\sum P(x)=0.759$
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as part of a water quality survey, you test the water hardness in sever…
B. With 99% confidence, you can say that the population standard deviation is between 10.1 and 22.1 grains per gallon.
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graphing scatterplots and trend lines you just found a positive trend l…
A positive trend line with a strong relationship means that for the five students, as homework scores go up, test scores also tend to go up, and the data points are closely groupe…
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check here for instructional material to complete this problem. find \\…
\(0.175\)
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enter values for x and y in the table to plot points in the graph. the …
positive trend line with a strong relationship.
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check here for instructional material to complete this problem. find su…
$0.799$
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question 12 what probabilities represent events that are unlikely to oc…
B. $\frac{5}{16}$, F. $\frac{1}{7}$
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as part of a water quality survey, you test the water hardness in sever…
\((10.1,22.1)\)
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evaluate \\( \\sigma = \\sqrt { n p ( 1 - p ) } \\) for \\( n = 1471, p…
\(18.8\)
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add a comma, semicolon, or colon if needed. otherwise, submit the text …
At the conference, Dr. Joyce saw several presentations on rare infectious diseases: Crimean - Congo hemorrhagic fever, sleeping sickness, Chagas disease, and Chikungunya fever.
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enter values for x and y in the table to plot points in the graph. the …
72
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evaluate μ = np for n = 1542, p = 3/4. μ = (simplify your answer. type …
\(1156.5\)
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enter values for x and y in the table to plot points in the graph. the …
For the score after sleeping 5 hours: \(67\). For the trend: tends to increase.
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as part of a water quality survey, you test the water hardness in sever…
B. With \(99\%\) confidence, it can be said that the population variance is between \(102.0\) and \(486.8\)
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as part of a water quality survey, you test the water hardness in sever…
\((102.0,486.8)\)
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enter values for x and y in the table to plot points in the graph. the …
Based on the trend line, the expected score after studying for 5 hours is approximately \(85\). The test score tends to increase as the number of hours studying increases.
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in this assignment, you will investigate the relationship between test …
test score
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in this assignment, you will investigate the relationship between test …
Test score; y - axis
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a magazine includes a report on the energy costs per year for 32 - inch…
D. With \(99\%\) confidence, you can say that the population standard deviation is between \(2.34\) and \(6.76\) dollars per year.
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according to a recent survey, 68% of adult americans consumed alcohol b…
0.1420
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a magazine includes a report on the energy costs per year for 32 - inch…
The confidence interval for the population standard deviation is \((2.34,6.76)\)
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6 multiple choice 1.43 points according to a recent survey, 68% of adul…
0.7526
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5 multiple choice 1.43 points according to a recent survey, 68% of adul…
B. 0.1168
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evaluate \\( \\sigma = \\sqrt { n p ( 1 - p ) } \\) for \\( n = 19, p =…
\(2.2\)
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using the regression calculator to make a prediction answer the questio…
18 t - shirts
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a magazine includes a report on the energy costs per year for 32 - inch…
A. With 99% confidence, you can say that the population variance is between 5.46 and 45.70.
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evaluate $mu + 2sigma$ when $mu = 4.5$ and $sigma = 0.3$. the value of …
\(5.1\)
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a magazine includes a report on the energy costs per year for 32 - inch…
The confidence interval for the population variance is \((5.46,45.70)\)
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the number of hours of reserve capacity of 10 randomly selected automot…
A. With 98% confidence, you can say that the population standard deviation is between \(0.141\) and \(0.453\) hours of reserve capacity.
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analyzing the variables sera sells t - shirts at the beach. she believe…
The independent variable, which will go on the \(x\) - axis, is the price of the t - shirts. The dependent variable, which will go on the \(y\) - axis, is the number of t - shirts…
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the number of hours of reserve capacity of 10 randomly selected automot…
The confidence interval for the population standard deviation \(\sigma\) is \((0.141,0.453)\)
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the number of hours of reserve capacity of 10 randomly selected automot…
B. With \(98\%\) confidence, it can be said that the population variance is between \(0.020\) and \(0.205\).
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the number of hours of reserve capacity of 10 randomly selected automot…
\((0.020,0.205)\)
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part 3 - word knowledge coarse most nearly means a smart. b rough. c cu…
B. rough.
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you randomly select and measure the contents of 10 bottles of cough syr…
A. With 80% confidence, you can say that the population standard deviation is between \(0.0230\) and \(0.0431\) inches.
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which trend line has been drawn correctly using the divide - center met…
The first graph (the left - most one among the options) has the trend line drawn correctly using the divide - center method.
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part 3 - word knowledge scoundrel most nearly means a spy. b scribe. c …
C. rascal
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you randomly select and measure the contents of 10 bottles of cough syr…
\((0.0230,0.0431)\)
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you randomly select and measure the contents of 10 bottles of cough 4.2…
C. With 80% confidence, it can be said that the population variance is between \(0.000530\) and \(0.001860\).
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which two points should the trend line go through to best represent the…
\((40,60)\) and \((71,78)\) (i.e., the third option \(\bigcirc(40,60)\) and \((71,78)\))
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you randomly select and measure the contents of 10 bottles of cough 4.2…
\((0.000530,0.001860)\)
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you randomly select and measure the contents of 10 bottles of cough syr…
$(0.000530,0.001860)$
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which of the following is not a reason childhood friendships are import…
B. Friends are a child’s first chance in learning how to be social with siblings.
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which scatterplot would have a trend line with a negative slope?
The second scatter - plot.
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the diameters (in inches) of 17 randomly selected bolts produced by a m…
B. With 90% confidence, you can say that the population standard deviation is between 0.214 and 0.389 inches.
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the diameters (in inches) of 17 randomly selected bolts produced by a m…
The confidence interval for the population standard deviation is \((0.214,0.389)\)
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match each data relationship with a type of correlation. y does not cha…
- \(y\) does not change based on changes in \(x\) → no correlation - \(y\) tends to increase as \(x\) increases → positive correlation - \(y\) tends to decrease as \(x\) increases…
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the diameters (in inches) of 17 randomly selected bolts produced by a m…
D. With \(90\%\) confidence, it can be said that the population variance is between \(0.046\) and \(0.151\).
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the diameters (in inches) of 17 randomly selected bolts produced by a m…
\((0.258,0.852)\)
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the diameters (in inches) of 17 randomly selected bolts produced by a m…
The confidence interval for the population variance is \((0.044,0.147)\)
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use technology to construct the confidence intervals for the population…
The confidence interval for the population standard deviation is \((28.86,52.45)\)
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incognito most nearly means a useless. b confused. c undercover. d cont…
C. undercover
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use technology to construct the confidence intervals for the population…
The confidence interval for the population variance is \((833.05,2751.07)\)
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fending most nearly means a agitating. b closing in. c quarreling. d wa…
D. warding off.
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part 3 - word knowledge alleviate most nearly means a lessen. b freshen…
A. lessen.
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prosperity most nearly means a richness. b vulgarity. c politeness. d b…
A. richness
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use technology to construct the confidence intervals for the population…
\((833.05,2751.07)\)
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exhilarate most nearly means a undergo. b absolve. c guess. d thrill.
D. thrill.
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use technology to construct the confidence intervals for the population…
The confidence interval for the population standard deviation is \((2.00,4.05)\)
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what is meant by the ight to redress\? a. the consumer has the right to…
D. The consumer has the right to fair settlement of disputes.