Statistics & Probability
Data analysis, probability distributions, hypothesis testing, and statistical methods.
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practice quiz 3 question 13 of 25 (1 point) | question attempt: 1 of un…
\(n = 1844\)
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11.7 find the equation of a regression line wjc find the equation for t…
\(y=-0.354x + 26.532\)
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direct satellite television it is believed that 25% of u.s. homes have …
Since we need to round up to the next whole number, \(n = 1383\)
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correct answer n = 3959 part: 1 / 2 part 2 of 2 if no estimate of the s…
\(n = 385\)
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widows a recent study indicated that 39% of the 107 women over age 55 i…
\(n = 3950\)
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educational television in a random sample of 210 people, 143 said that …
$0.628<p<0.734$
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jamal decides to research the relationship between the length in inches…
The slope represents the change in the weight of the catfish (in pounds) per one - inch change in the length of the catfish.
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use the information given to answer the question. anna is a cosmetologi…
Brooke is paid a flat fee of \(\$75\) for each shipment that she distributes.
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describe the association in the scatter plot below. answer attempt 1 ou…
The scatter plot shows a positive association because as the plotted values of \(x\) increase, the values of \(y\) generally increase.
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4. pair - a - dice the dotplot shows the results of rolling a pair of 6…
The distribution is unimodal and symmetric.
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read the following paragraph from the section \is the immigrant populat…
C. The population growth in the United States going into 2065 will be driven not only by new arrivals but also by births to immigrants.
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the prologue from romeo and juliet by william shakespeare directions: a…
Two families, both of high social status, In beautiful Verona, where our story takes place, From an old grudge comes new rebellion, Where the blood of citizens makes their hands u…
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46. \a picture is worth a thousand words.\ the meaning of this phrase c…
idiom
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43. cyrus is reading critically in order to learn about the piece of in…
He is interrogating evidence and conclusions.
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25. jenna is looking at a listing for a rental property and asks her bo…
two bedrooms and one bathroom
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stem connection focus on math sc.8.p.8.8, ma.k12.mtr.2.1 you might be w…
A solution with a \(pH\) of \(11\) is \(1000\) times more basic than a solution with a \(pH\) of \(8\).
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this table shows the distance of each data point from the mean of the d…
The second table has a larger average deviation.
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question 12 (1 point) which is the best possible explanation for the de…
Question 12: E. A combination of environmental and cultural factors supported plant cultivation. Question 13: B. small farm size producing just enough to feed a family.
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alison: dont you think it is disrespectful for tourists to get traditio…
It enters Alison and the interviewee into a debate rather than gathering information.
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given the following descriptions, which of the following correctly comp…
The center of graph 1 is three places away from graph 2 and points are on average five away from the center.
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which of the following correctly calculates the average deviation from …
The average deviation from the mean is \(0.67\)
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source 1: \birds dont eat monarch butterflies. we tasted a male butterf…
Unreliable. The authors are unreliable because the term "nature enthusiast" does not necessarily mean "expert"; not enough is known about them besides being vacationers.
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five friends recorded the number of action figures each friend has. the…
The average deviation from the mean is 1.28.
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deviation from the mean practice complete this assessment to review wha…
The average deviation from the mean of dataset \(A\) is \(1.375\). The average deviation from the mean of dataset \(B\) is \(2.25\)
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complete the table to find the deviation of each data point. (2 points)…
| Deviation | |----| | - 2.25 | | - 0.25 | | 0.25 | | 2.75 |
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match the graph with its related table. choose the correct answer below…
B.
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the butcher told us to buy the new york strip if we wanted a lean piece…
B. having little fat.
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a baseball teams total home runs and wins over the last eight years is …
Equation of line of best fit: \(y = 0.43x-28.01\), Correlation coefficient: \(r\approx0.91\) (A. Strong Positive), Prediction for \(x = 204\): E. 60
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hospital noise levels for a sample of 5 operating rooms taken in a hosp…
\(21.60<\mu<63.60\)
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22 the mother told her son that he needed to mind her better. the meani…
D. to obey.
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how can percents show proportional relationships between quantities and…
Percents show proportional relationships as \(\frac{\text{part}}{\text{whole}}=\frac{\text{percent}}{100}\). This proportion can be used to solve problems by cross - multiplying a…
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the teacher told her students to pound the dough flat before baking it.…
C. to strike or beat.
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ballpoint pen by ashton bennett john jacob loud was an american invento…
A. sold
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a baseball teams total home runs and wins over the last eight years is …
- Line of best fit: \(y = 0.51x-46.25\) - Correlation coefficient: \(r\approx0.93\) - Relationship: A. Strong Positive - Prediction (assuming some calculation leniency, but based …
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overtime hours worked a random sample of 17 registered nurses in a larg…
\(42.8<\mu<46.0\)
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← back to home d2 line of best fit and scatter plots date: november 19 …
\(309.4\) thousand dollars
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here are the numbers of children in 14 elementary school classes. 18, 1…
\(20\)
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here are the numbers of times 10 people ate out last month. 5, 4, 9, 0,…
No mode
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the following list gives the number of public libraries in each of 10 c…
\(4,5\)
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the following list gives the number of siblings for each of 13 students…
\(2\)
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the table shows the numbers y (in thousands) of people in a city who re…
The function is \(y = 1.179(1.123)^{x}\). The number of users after 32 weeks is approximately \(40200\) (since \(y\approx40.15\) thousand and \(40.15\times1000 = 40150\approx40200…
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here are the numbers of children in 9 elementary school classes. 18, 17…
No mode
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2. visualizing fuel efficiency the dotplot shows the difference (highwa…
a. The dot above - 3 for the Toyota Prius means that the city mileage rating of the Toyota Prius is 3 mpg higher than its highway mileage rating. b. Suppose the number of cars wit…
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overtime hours worked a random sample of 12 registered nurses in a larg…
\(43.2<\mu<46.4\)
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here are the numbers of children in 9 elementary school classes. 18, 17…
No mode
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here are the numbers of times 8 people ate out last month. 7, 4, 6, 5, …
\(3,5\)
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the following list gives the number of public libraries in each of 13 c…
\(4,5\)
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the following list gives the number of siblings for each of 15 students…
\(2\)
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select the text from the paragraph that best helps you understand that …
At this point, they are just learning to make sounds and having fun. The babies' throats and mouths are getting used to working. They might make sounds that are almost words.
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one reckless move could get you into trouble. what does this mean? alwa…
B. One careless move could get you into trouble.
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you are testing a claim and incorrectly use the normal sampling distrib…
The null hypothesis is more likely to be rejected. The result is the same for left - tailed, right - tailed, and two - tailed tests.
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review the sixth paragraph. wanted to, you could eat a burrito while pl…
It explains why this issue is important.
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review the third paragraph. in every way that matters, burritos are san…
According to the Colorado definition, a burrito is considered a sandwich. In New York, a burrito fits the definition for a sandwich.
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you are testing a claim and incorrectly use the normal sampling distrib…
More likely. For degrees of freedom less than 30, the tail of the curve are thicker for a \(t -\)distribution. Therefore, if you incorrectly use a standard normal sampling distrib…
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use the given frequency distribution to find the (a) class width. (b) c…
\(3\)
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guillermo says he read a contemptuous review. what does this mean? a he…
B. He read a proudly disrespectful review.
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use the given frequency distribution to find the (a) class width. (b) c…
\(13\)
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a car company says that the mean gas mileage for its luxury sedan is at…
Reject \(H_0\). At the \(5\%\) significance level, there is sufficient evidence to reject the car company’s claim that the mean gas mileage for the luxury sedan is at least \(25\)…
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a car company says that the mean gas mileage for its luxury sedan is at…
The standardized test statistic is \(-2.24\)
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a car company says that the mean gas mileage for its luxury sedan is at…
For the sampling distribution: F. Use a t - sampling distribution because the population is normal, and \(\sigma\) is unknown. For the hypotheses: C. \(H_{0}:\mu\geq25\), \(H_{a}:…
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a car company says that the mean gas mileage for its luxury sedan is at…
F. Use a t - sampling distribution because the population is normal, and $\sigma$ is unknown.
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you receive a brochure from a large university. the brochure indicates …
D. At the 5% level of significance, there is sufficient evidence to support the claim that the mean class size for full - time faculty is fewer than 33 students.
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you receive a brochure from a large university. the brochure indicates …
B. Reject \(H_0\) because the \(P\) - value is less than the significance level.
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you receive a brochure from a large university. the brochure indicates …
\(P = 0.038\)
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a mathematics teacher wanted to see the correlation between test scores…
Regression Equation: \(y = 0.7x+13.8\) Final Answer: \(66\)
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you receive a brochure from a large university. the brochure indicates …
D. \(H_0:\mu\geq33\), \(H_a:\mu < 33\)
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the dean of a university estimates that the mean number of classroom ho…
D. Fail to reject $H_0$ because the P - value is greater than the significance level. C. At the 5% level of significance, there is not sufficient evidence to reject the claim that…
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the dean of a university estimates that the mean number of classroom ho…
C. At the 5% level of significance, there is not sufficient evidence to reject the claim that the mean number of classroom hours per week for full - time faculty is 11.0.
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the dean of a university estimates that the mean number of classroom ho…
D. Fail to reject \(H_0\) because the \(P\) - value is greater than the significance level.
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the dean of a university estimates that the mean number of classroom ho…
We fail to reject the null hypothesis \(H_0\). So, at the \(\alpha = 0.05\) significance level, there is not enough evidence to reject the dean's claim that the mean number of cla…
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the dean of a university estimates that the mean number of classroom ho…
\(P = 0.279\)
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the dean of a university estimates that the mean number of classroom ho…
D. \(H_0:\mu = 11.0\), \(H_a:\mu eq11.0\)
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an oceanographer claims that the mean dive duration of a north atlantic…
There is not enough evidence at the \(1\%\) level of significance to reject the claim that the mean dive duration of a North Atlantic right whale is \(11.6\) minutes.
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3 - 115. louis recorded how many times he could jump rope without stopp…
Median: \(61\), Lower quartile: \(48\), Upper quartile: \(97\)
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an oceanographer claims that the mean dive duration of a north atlantic…
Fail to reject \(H_{0}\) because the \(P -\)value is greater than \(\alpha\).
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an oceanographer claims that the mean dive duration of a north atlantic…
\(P = 0.068\)
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an oceanographer claims that the mean dive duration of a north atlantic…
\(t = 1.88\)
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length of growing seasons the growing seasons for a random sample of 37…
\(170.6<\mu<206.3\)
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an oceanographer claims that the mean dive duration of a north atlantic…
\(H_0:\mu = 11.6\) \(H_a:\mu eq11.6\) The claim is the null hypothesis.
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a consumer group claims that the mean minimum time it takes for a sedan…
There is enough evidence at the \(10\%\) level of significance to support the claim that the mean minimum time it takes for a sedan to travel a quarter mile is greater than \(14.7…
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find the mode and the range for the data. (a) mode: (b) range: ten stud…
(a) Mode: \(7\) (b) Range: \(6\)
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a consumer group claims that the mean minimum time it takes for a sedan…
\(P = 0.044\)
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here are the scores of 12 students on a history test. 61, 65, 67, 67, 6…
Minimum: \(61\), Median: \(77\), Maximum: \(89\), Lower quartile (\(Q_1\)): \(67\), Upper quartile (\(Q_3\)): \(86\), Inter - quartile range (IQR): \(19\)
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a consumer group claims that the mean minimum time it takes for a sedan…
\(t = 1.78\)
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a consumer group claims that the mean minimum time it takes for a sedan…
- \(H_{0}:\mu\leq14.7\) - \(H_{a}:\mu > 14.7\) - The claim is the alternative hypothesis.
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test a claim that the mean amount of carbon monoxide in the air in u.s.…
There is not enough evidence at the \(1\%\) level of significance to support the claim that the mean amount of carbon monoxide in the air in U.S. cities is less than \(2.32\) part…
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the following are the distances (in miles) to the nearest airport for 1…
Minimum: $9$; Lower quartile: $18$; Median: $34.5$; Upper quartile: $39.5$; Maximum: $44$; Inter - quartile range: $21.5$
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modeling real life the scatter plot shows the total earnings (wages and…
a. The server must work about \(5\) hours to earn $70. b. The server earns about $\(70\) for 5 hours of work. c. The data show a positive relationship between hours worked and ear…
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test a claim that the mean amount of carbon monoxide in the air in u.s.…
\(0.23\)
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test a claim that the mean amount of carbon monoxide in the air in u.s.…
Since the test statistic \(t\approx - 0.15\) is not less than the critical value \(t_{0}=-2.38\), we fail to reject the null hypothesis. So, there is not enough evidence at the \(…
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test a claim that the mean amount of carbon monoxide in the air in u.s.…
\(- 2.38\)
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question 19 which professional would most likely be the one to coordina…
Administrative Services Manager
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use technology and a t - test to test the claim about the population me…
C. Fall to reject \(H_0\). There is not enough evidence to support the claim.
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use technology and a t - test to test the claim about the population me…
The P - value is \(0.329\)
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length of growing seasons the growing seasons for a random sample of 44…
\(175.3<\mu<208.3\)
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use technology and a t-test to test the claim about the population mean…
The value of the standardized test statistic is \(0.45\).
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use technology and a t - test to test the claim about the population me…
C. \(H_0:\mu\leq71\), \(H_A:\mu > 71\)
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state whether the standardized test statistic t indicates that you shou…
(a) Reject \(H_{0}\), because \(t = 1.556>1.528\). (b) Fail to reject \(H_{0}\), because \(t = 0<1.528\). (c) Fail to reject \(H_{0}\), because \(t = 1.492<1.528\). (d) B. Fail to…
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state whether the standardized test statistic t indicates that you shou…
D. Fail to reject \(H_{0}\), because \(t < 1.528\)
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state whether the standardized test statistic t indicates that you shou…
(a) B. Reject \(H_{0}\), because \(t>1.528\). (b) C. Fail to reject \(H_{0}\), because \(t < 1.528\). (c) D. Fail to reject \(H_{0}\), because \(t < 1.528\). (d) D. Fail to reject…