What do you value most when shopping in a retail store? According to a survey, 27% of consumers value personalized experience most. Complete parts (a) through (d) below.a. Suppose that the survey had a sample size of n = 1000. Construct a 90% confidence interval estimate for the population proportion of consumers that value personalized experience most whenshopping in a retail store?(Round to four decimal places as needed.)b. Based on (a), can you claim that more than quarter of all consumers value personalized experience most when shopping in a retail store?O A.Yes, with 90% confidence because the sample proportion is greater than a quarter, and it falls within the limits of the confidence interval estimate.O B.No, because a 90 % confidence interval is not indicative of a guarantee. A 99.9% confidence interval would be needed to make such a claim.O C. Yes, with 90% confidence because all the values contained in the confidence interval are greater than 0.25.O D. No, because the confidence interval contains proportion values that are less than 0.25.c. Repeat parts (a) and (b), assuming that the survey had a sample size of n = 10,000.Construct a 90% confidence interval estimate for the population proportion of consumers that value personalized experience most when shopping in a retail store.(Round to four decimal places as needed.)Based on the confidence interval created using a sample size of 10,000, can you claim that more than a quarter of all consumers value personalized experience most when shopping in a retail store?O A. Yes, with 90% confidence because the sample proportion is greater than a quarter, and it falls within the limits of the confidence interval estimate.O B. No, because a 90% confidence interval is not indicative of a guarantee. A 99.9% confidence interval would be needed to make such a claim.O C. Yes, with 90% confidence because all the values contained in the confidence interval are greater than 0.25.O D. No, because the confidence interval contains proportion values that are less than 0.25.d. Discuss the effect of sample size on confidence interval estimation.Choose the correct answer below.O A. A larger sample size results in a wider confidence interval, holding everything else constant.O B. A larger sample size has no effect on a confidence interval, holding everything else constant.O C. A larger sample size results in a narrower confidence interval, holding everything else constant.OD. It is impossible to compare confidence interval estimates with difference sample sizes because the sample size is part of the formula for finding confidence interval estimate limits.

From a survey, when shopping in retail stores 27% of consumers value personalized experience most.It…

Answered: a. Suppose that the survey had a sample…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99% confidence assuming s=17.8 based on earlier studies? Suppose the doctor would be content with 99% confidence. How does the decrease in confidence affect the sample size required? a. A 99% confidence level requires _______ subject. b. 90% confidence level requires ________ subject. c.How does the decrease in confidence affect the sample size required? a.Decreasing the confidence level decreases the sample size needed. b.Decreasing the confidence level increases the sample size needed. c.The sample size is the same for all levels of confidence.
What do you value most when shopping in a retail store? According to a survey, 27% of consumers value personalized experience most. Complete parts (a) through (d) below. a. Suppose that the survey had a sample size of n=800. Construct a 95% confidence interval estimate for the population proportion of consumers that value personalized experience most when shopping in a retail store? (Pound to four decimal places as needed.)
Jse the sample data and confidence level given below to complete parts (a) through (d). A drug is used to help prevent blood clots in cértain patients. In clinical trials, among 4334 patients treated with the drug, 12 developed the adverse reaction of nausea. Construct a 95% confidence interval for the proportion of adverse reactions. a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E =
II. A. Find the t-value corresponding to each level of confidence and degrees of freedom. (2 pts) 1. 90% confidence level and n= 12 2. 99% confidence level and n=20 3. a =1% and n= 16
The figure to the right shows the results of a survey in which 1500 college graduates from the year 2016 were asked questions about employment. Employment College students' responses to questions about employment Construct 99% confidence intervals for the population proportion of college students who gave each response. Expect to stay at firet employer for 3 or more years 73% Comploted an apprenticeship or intemship 67% Employed in field of study 61% Foel underemployed 53% Prefer to work for a large company 17% The 99% confidence interval for the proportion of college students that expect to stay at their first émployer for 3 or more years is ( D. (Round to three decimal places as needed.)
I only need part B
10. Which one of the following statements about confidence intervals is false? A. Given the same sample of data, a 90% confidence interval will be narrower than a 95% confidence interval. B. The size of the population does not affect the width of a confidence interval. C. The population proportion determines the center of the confidence interval. D. The value of z* affects the width of a confidence interval. E. The general format of a confidence interval is “sample statistic ± margin of error.”
I think the answer to this last part is C
NEED ANSWER ASAP HELP
Determine whether the following statements are True or False: If we increase the confidence level C, then the width of the CI decreases, i.e., the CI becomes narrower. (Hint: think about what happens to the margin of error m) Suppose the mean of a population µ = 100. If we found that the margin of error is m = 2 for level of confidence 98%, then we can be 98% confident that a sample mean (computed from a sample of the same size used to compute m) is in the interval (98, 102).
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96

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