A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5 8 9 5 7 If you are to get the 95% confidence interval, what is the t-value? O 1.8331 O 1.8125 O 2.2010 O 2.2622

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A: See the handwritten solution

Q: A sample of 28 was taken from a population, and r = .45. What is the 95% confidence interval for the…

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Q: A random survey of 495 adults found that 59 had diabetes. Which of the following is a 98% confidence…

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Q: 1. The following are wait times (in minutes) at a certain DMV: 25   76   56   45   35   88   75…

A: (a) Obtain the 95% confidence interval for the mean wait time at this DMV.   The 95% confidence…

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Q: Using the information from above, with p′=0.595, q′=0.405, and n=420, what is the 90% confidence…

A: Obtain the 90% confidence interval for the proportion of the population who subscribe to cable TV.…

Q: Which of the following is thet-value for a 95% confidence level when the sample size is 20. O a.…

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Q: A random selection of people in a city were asked “How much do you spend on gasoline per  month?”…

A: Obtain the 95% confidence interval that contains the average monthly income for all people in this…

Q: Use the following information to compute the confidence interval for the population a. n = 715 and x…

A: a) Given Data Sample Size, n = 715 Number of successes, x = 329.0 confidence…

Q: Which of the following 95% confidence intervals would lead us to reject Ho:p = 0.30 in favor of H.:p…

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Q: A simple random sample of 5 observations from a normal distribution was taken, and the following…

A: Question 8) Solution: n= 5 Sample size  To find sample mean and sample standard deviation  x…

Q: 50. Suppose a 90% confidence interval is stated as (0.3011, 0.4189). What is the sample proportion…

A: Given information- We have given a value of 90% confidence interval is- C.I = (0.3011, 0.4189) Lower…

Q: A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5…

A: Given data  4.5,5,5.5,6,6,7,7.5,7.5,8,9,5,7 n=12

Q: Select all of the following choices that are possible confidence intervals on the population value…

A: The notation r represents the statistic, which is the value of the linear correlation coefficient…

Q: Giving a test to a group of students, the grades and gender are summarized below A C Total Male 14…

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Q: Here are summary statistics for randomly selected weights of newborn girls: n= 176, x= 33.8 hg, s=…

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Q: Giving a test to a group of students, the grades and gender are summarized below   A B C Total…

A: Obtain the 90% confidence interval for the population proportion of all female students who would…

Q: A cell phone company claims that the average time a person spends on their phone is 12.8 hours a…

A: Let μ denote the population mean and x¯ denotes the sample mean. Then, μ=12.8 and x¯=12.2. Let n be…

Q: Construct the confidence interval for the population mean u. c= 0.98, x= 16.2, o =6.0, and n= 100…

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Q: A survey of 385 people found that 114 graduated college. Which of the following is a 90% confidence…

A: Given X=114 n=385 90% confidence interval for proportion  Zc=1.645  , at alpha=0.10 p=X/n

Q: (e) Find a 90% confidence interval for the population proportion p of all adults who bought a…

A: Sample proportion = 868/1523 = 0.57 z-critical value = 1.645

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Q: A sample of 64 was taken from a population, with the mean of the sample being 25 and the standard…

A: It is given that  Sample mean = 25 Sample standard deviation = 2 Sample size = 64 Confidence level =…

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Q: A random sample of 200 female high school students in India showed that 110 are on Facebook. A…

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Q: 4.) The following are wait times (in minutes) at a certain DMV: 45 77 65 25 76 56 45 35 88 75 66 66…

A: Given waiting time 25,76,56,45,35,88,75,66,45,77,65,66,43,65

Q: Suppose that the population of the scores of all high school seniors who took the SAT Math (SAT-M)…

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Q: Here are summary statistics for randomly selected weights of newborn girls: n= 166, x= 27.9 hg,…

A: Given : n=166x¯=27.9s=7.8For 98% confidence interval,α=1-0.98=0.02

Q: Which of the following is NOT an equivalent expression for the confidence interval given by o.34 < p…

A: Given information- We have given the confidence interval- 0.34 &lt; p &lt; 0.6 We have given the 4…

Q: Which of the following would result in the widest confidence interval? O A sample size of 30 with…

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Q: The manager of the local health club is interested in determining the number of times members use…

A: Confidence interval is an interval such that the probability of the true value of an unknown…

Q: Using the information from above, with p′=0.265, q′=0.735, and n=340, what is the 95% confidence…

A: The 95% confidence interval for the proportion of the population who lease a car is:

Q: Giving a test to a group of students, the grades and gender are summarized below A В C Total Male 9…

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Q: In a random sample of 95 manufacturing firms, 67 indicated that their company attained ISO…

A: For part i]: Linear relationship: 1]The graph of linear relationship forms a straight line.  2] A…

Q: Which of the following would result in the narrowest confidence interval? O A sample size of 30 with…

A: The confidence interval depends on the three factors: Confidence level: The width of the confidence…

Q: Here are summary statistics for randomly selected weights of newborn girls: n= 150, x = 31.3 hg, s=…

A: Given, n=150 x-  = 31.3 s=7.8

Q: In constructing a 95% confidence interval for the mean, which of the following is the most…

A: Formula : Margin of error: ME=Zα/2 * (σ/√n)

Q: Using the data below, a) generate a 95% confidence interval for the proportion of all patients with…

A: It is given that, p hat is 0.715, margin of error (E) is 0.05 and the sample size (n) is 150.  The…

Q: A simple random sample of 49 8th graders at a large suburban middle school indicated that 89% of…

A: Given,sample size(n)=49sample proportion(p^)=0.891-p^=1-0.89=0.11α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: (e) Find a 90% confidence interval for the population proportion p of all adults who bought a…

A: Given: x=868 n=1523 p^=xn=8681523=0.5699

Q: n=15 measurements from a normal distribution. Compare the standard normal z values with the…

A: a. The value of z critical value at 99% confidence level is 2.576, which can be obtained by using…

Q: Which of the following is NOT an equivalent expression for the confidence interval given by o.35 <p<…

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Q: 14. For each of the following three sample sizes, construct the 95% confidence interval for the…

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, N is…

Q: The following data are the amounts that a sample of 15 customers spent for lunch​ ($) at a​…

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Q: Construct the confidence interval for the population mean u. c=0.95, x 15.3, o =7.0, and n = 75 A…

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Q: A car rental agency has the following kms (in thousands) for a simple random sample of 20 cars…

A: Given Information: Sample size (n) = 20 Confidence level = 90% = 0.90 Significance level…

Q: A sample of 64 is taken from a population, with the mean of the sample being 119 and the standard…

A: Option B is correct (113, 125)

Q: 1. A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 1. confidence…

A: We have to find confidence interval for the true proportion of women shoppers who shop on impulse.

Q: Suppose that the population of the scores of all high school seniors who took the SAT Math (SAT-M)…

A: From the above data The correct option is.  C) 99%