Statistiques
Analyse de données, distributions de probabilités et tests d'hypothèses.
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question 18 of 25 suppose there is a strong positive correlation betwee…
B. When \(m\) increases, \(n\) tends to increase.
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8.4.3 test (cst): data and mathematical modeling this table shows the p…
No, the prediction does not make sense. Because the number of owls (\(y\)) cannot be negative in reality, and the model predicts \(y = - 11\) for year \(8\).
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homework: unfamiliar vocabulary: summer of the mariposas, chapter 5 nam…
1. d. highlight 2. b. without drawing attention 3. d. off the road
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8.4.3 test (cst): data and mathematical modeling which graph has a corr…
B. Graph B
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8.4.3 test (cst): data and mathematical modeling what is the exponentia…
B. \(y = 1.22(2.84^{x})\)
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8.4.3 test (cst): data and mathematical modeling what is the equation o…
D. \(y=-0.927x + 13.634\)
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reading (comprehension and vocabulary) (continued) 5 so what can be use…
7. C. a usual way of doing something 8. B. They waste even more water, labor, and fertilizers. 9. D. passing the inspection
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what is the r - value of the following data, to three decimal places? a…
C. -0.903
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8.4.3 test (cst): data and mathematical modeling what is the quadratic …
C. \(y=-1.94x^{2}+0.62x + 9.62\)
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question 7 of 25 a set of data points has a line of best fit of ( y = -…
D. \(0.1\)
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question 5 of 25 which of the following r-values represents the stronge…
C. \(0.75\)
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question 4 of 25 if time is an explanatory variable and temperature is …
B. Time
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8.4.3 test (cst): data and mathematical modeling by visual inspection, …
A. No pattern
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describing the properties of polynomial addition what do the properties…
- 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…
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question 2 of 25 suppose the correlation coefficient between the number…
C. As the number of college students increases, the number of buses tends to increase.
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question 10 of 10 the number of cases of a new disease can be modeled b…
A. 88
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8.3.3 quiz: nonlinear models by visual inspection, determine the best -…
C. Quadratic
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d the excerpt from julius caesar act 2, scene 2 cotus caesar, all hail!…
It is ridiculous that a man who has won so many battles would be afraid to tell the truth.
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8.3.3 quiz: nonlinear models this table shows the profit for a company …
A. \(13.76\) million
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8.3.3 quiz: nonlinear models which regression equation best fits these …
A. \(y=-0.32x^{2}-1.26x + 15.81\)
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the meaning of the russian term glasnost in english is o \freedom.\ o \…
"openness."
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8.3.3 quiz: nonlinear models what is the exponential regression equatio…
B. \(y = 3.02\cdot2.26^{x}\)
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8.3.3 quiz: nonlinear models what is the quadratic regression equation …
B. \(y = 2.09x^{2}+0.33x + 3.06\)
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what is one way in which finding an arithmetic mean is different then f…
The arithmetic mean uses addition and division (\(\bar{x}=\frac{\sum_{i = 1}^{n}x_i}{n}\)), while the geometric mean uses multiplication and root - taking (\(G=\sqrt[n]{\prod_{i=1…
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22. kyle invests $600 which earns 3% annual simple interest for 5 years…
After 5 years, Kyle will have \(690\) dollars. The rate of change of \(18\) dollars per year means that Kyle's investment grows by \(18\) dollars each year.
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read the sentence. we knew algerlynn must be angry because her features…
furious
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27. a sample of ( n = 36 ) scores is selected from a normal distributio…
a. The z - score is $z=-3$, and the sample mean is an extreme value. b. The z - score is $z = -1.2$, and the sample mean is a typical value.
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7) stephanie has $152 in the bank. she withdraws $20. then she deposits…
The addition expression is \(152+( - 20)+84\) and the sum is \(216\). It means Stephanie has \(216\) dollars in the bank after the withdrawal and deposit.
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based on the distribution, how often did most people eat at a fast - fo…
The class \(1.5 - 2.5\) has the highest frequency, so most people ate at a fast - food restaurant in the class \(1.5 - 2.5\).
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26. suppose that a researcher developed a drug that she claims increase…
Since the probability of getting a sample mean of \(M = 115\) (or more extreme in the direction of the claim) is \(p=0.1587\), which is greater than the common significance levels…
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part 1 of 5 what is the class width for a frequency distribution with 7…
The class width is \( 7 \).
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what is the class width for a frequency distribution with 7 classes? th…
The class limits are: \(60 - 66\) \(67 - 73\) \(74 - 80\) \(81 - 87\) \(88 - 94\) \(95 - 101\) \(102 - 108\)
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part 1 of 5 what is the class width for a frequency distribution with 7…
7
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stories in the worlds tallest buildings the number of stories in each o…
7
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how does the author organize the ideas in the section isky riding\? a c…
The author describes the events that led to early seatbelts in the order they happened.
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reading (comprehension and vocabulary) directions: read the passage. th…
D. at risk of being affected by
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the powerful hurricane was headed towards us, so we evacuated our home.…
left
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eating at fast food restaurants a survey was taken of 40 individuals. t…
| Class limits | Class boundaries | Frequency | | ---- | ---- | ---- | | \(0 - 1\) | \(-0.5 - 1.5\) | \(5\) | | \(2 - 3\) | \(1.5 - 3.5\) | \(20\) | | \(4 - 5\) | \(3.5 - 5.5\) | …
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1. how many more cars were parked on monday and tuesday than on wednesd…
2 cars For question 2:
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construct a frequency distribution using 8 classes (0 - 7). class limit…
40
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which sentence correctly uses a semicolon? a. the doors to the hallway …
C. Sarah asked me to fold the clothes in the laundry room; nevertheless, all of the clothes were folded and stacked neatly on the shelf.
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eating at fast food restaurants a survey was taken of 40 individuals. t…
| Class limits | Class boundaries | Frequency | |--------------|------------------|-----------| | 0 | -0.5 - 0.5 | 3 | | 1 | 0.5 - 1.5 | 5 | | 2 | 1.5 - 2.5 | 18 | | 3 | 2.5 - 3.5…
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13. a population forms a normal distribution with a mean of $mu = 85$ a…
a. \(z = 0.5\) b. \(z=0.75\) c. \(z = 1\) d. \(z = 1.5\)
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the city council is looking for ways to use the vacant land near the ma…
C. after "lot"
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the bar gra the right shows the average cost of room and board at four-…
B. The linear model is better
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determine whether the data are discrete or continuous. height of an off…
Continuous
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a set of data points has a line of best fit of $y = 2.5x - 1.5$. what i…
B. - 1.5
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determine whether the data are qualitative or quantitative. the number …
Quantitative
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determine whether descriptive or inferential statistics were used. seve…
descriptive
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8.2.3 quiz: fitting linear models to data a calculator was used to perf…
D. \(y = - 3.1x+12.9\)
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12. a sample of ( n = 64 ) scores has a mean of ( m = 68 ). assuming th…
a. \(z = 4\) b. \(z = 2\) c. \(z\approx1.33\)
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what does it mean to say that a data point has a residual of 1? a. the …
B. The point lies 1 unit above the regression line.
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8.2.3 quiz: fitting linear models to data what is the equation of the l…
C. \(y = 0.894x+0.535\)
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question 3 of 10 a data set consists of the following data points: (2,4…
A. 6
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\deaf poets society: for writers with disabilities\ by corinne segal so…
People with disabilities often have a difficult time telling their own stories.
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consider the graphs below. what are the explanatory variables? a. heigh…
C. Temperature, Time, Length
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in a sample of 800 u.s. adults, 202 think that most celebrities are goo…
\(0.441\)
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11. sales representatives at a cellular phone retailer sell a mean of $…
\(z = 2\)
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the graph shows the volume of ice cubes versus temperature in degrees c…
C. The data show a negative linear relationship.
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read the passage. then answer the question. fossils fossils are the rem…
Same: lived; Opposite: died
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which of these r - values represents the strongest correlation? a. - 0.…
B. - 0.8
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which of these r-values represents the weakest correlation? a. 0.2 b. 0…
D. \(0.1\)
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question 6 of 10 suppose that there were a strong correlation between t…
C. \(n\) may cause \(p\)
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read the passage. then answer the question. skyscraper technology the f…
took the place of
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question 5 of 10 which of the following graphs shows a negative linear …
B. Graph B
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what is the constant of proportionality in dollars per mile?
\(0.5\)
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tessas uncle bill was the most loquacious person tessa knew. unlike tes…
"Uncle Bill could chat for hours", "Unlike Tessa, who spoke infrequently,"
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question 3 of 10 suppose the correlation coefficient between a babys we…
A. As the baby gains weight, the number of coffee shops tends to increase.
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data analysis and probability identifying peaks, symmetry, gaps, and cl…
Is there a cluster from 28 to 30? Yes Is there a gap at 33? No Is the data set symmetric? No
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which of these is not a possible r - value? ○ a. - 0.75 ○ b. 1.5 ○ c. 0…
B. \( 1.5 \)
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question 1 of 10 which graph best represents the following situation? a…
A. Graph A
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11 multiple choice 1 point which answer best describes the type of crim…
B. Felony
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4. a sample is selected from a population with a mean of (mu = 100) and…
a. The expected value of \(M\) is \(100\) and the standard error of \(M\) is \(5\) b. The expected value of \(M\) is \(100\) and the standard error of \(M\) is \(2\)
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why is urban planning important? a it serves as a common resource where…
B. It ensures that all factors are carefully considered when planning and building a city.
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find the absolute and relative errors in the following situation. your …
\(2\)
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find the absolute and relative errors in the following situation. your …
The absolute error is \(4\) miles per hour. The relative error is approximately \(0.19\) (rounded to two decimal places).
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find the probability of exactly four successes in five trials of a bino…
\(7.7\%\)
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find the probability of exactly one success in five trials of a binomia…
\(20.4\%\)
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find the probability of exactly 5 successes in 6 trials of a binomial e…
\(23.2\%\)
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21. for a population with a mean of $mu = 72$ and a stan-dard deviation…
If \(n = 1\), the standard error is \(10\). But if this is a sampling - distribution problem and \(n\) was omitted in the problem statement, the formula is $\sigma_{\bar{x}}=\frac…
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(c) plot a histogram from the data shown in the table. time (hours) fre…
The frequency densities are \(0.75\), \(1.25\), \(2.75\), \(2.5\), \(2\) for the class intervals \(0 < h\leq4\), \(4 < h\leq8\), \(8 < h\leq16\), \(16 < h\leq22\), \(22 < h\leq25\…
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find the probability of exactly three successes in six trials of a bino…
\(31.3\%\)
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find the probability of exactly five successes in seven trials of a bin…
\(31.8\%\)
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what is the constant of proportionality in grams per ounce?
\(2.5\)
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(b) plot a histogram from the data shown in the table. speed (mph) freq…
The completed table with frequency densities: | Speed (mph) | Frequency | Frequency Density | |----|----|----| | \(0 < s\leq10\) | \(5\) | \(0.5\) | | \(10 < s\leq35\) | \(30\) | …
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find the probability of exactly three successes in eight trials of a bi…
\(P(3)={}_8C_3(0.45)^3(0.55)^{5}\approx0.256\)
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(a) plot a histogram from the data shown in the table.
The completed table with frequency densities: | Height (\(cm\)) | Frequency | Frequency Density | |---|---|---| | \(0 < h\leq20\) | \(24\) | \(1.2\) | | \(20 < h\leq40\) | \(32\) …
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a new landing i can only remember bits and pieces of the stellar specta…
B. The event convinces the narrator of the importance of science and space exploration
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deny means to: inquire about repeat or do over declare untrue; contradi…
declare untrue; contradict
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grave has the same or almost the same meaning as: tomb shelf slope trunk
A. tomb
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4.3.2 quiz: northern and southern cultures question 5 of 10 how did adv…
B. They provided opportunities to rise in society.
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find the probability of exactly three successes in eight trials of a bi…
\(0.0503\)
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find the probability of exactly three successes in eight trials of a bi…
$$ (0.55)^{8 - 3}=(0.55)^{5} $$ The value in the box is \(5\).
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read the excerpt from does my head look big in this? by randa abdel - f…
The narrator is frightened because she is a Muslim making a Catholic confession.
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find the probability of exactly three successes in eight trials of a bi…
\(0.0911\)
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3. zeke is a semi - famous influencer on the internet. semi - famous me…
3. C. somewhat well known 4. (Example) The company has semi - annual sales reports. (Or other correct sentences using the words)
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read the excerpt from jawaharlal nehrus speech \a tryst with destiny.\ …
Representatives have to dedicate themselves to constant work and service.
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1. tillys had a semi - annual sale. semi - annual means: * every 6 mont…
1. every 6 months 2. shared by 2 people
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en 1920, oficiales del ejército nacionalista alemán afirmaron que la re…
- Primera pregunta: aceptando el Tratado de Versalles. - Segunda pregunta: Alemania concedió a Hitler poderes de emergencia mediante la Ley Habilitante. - Tercera pregunta: Todas …
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example #2: the politician used manipulation by twisting facts and show…
For Example #2: MANIPULATION most likely means: the act of influencing or controlling (in a devious way). The type of clue is: example - based. For Example #3: CENSORSHIP most lik…