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An airline wants to survey its customers to ask them: "Do you approve of limiting the...
a. Based on this sample, develop and interpret a 95% confidence interval estimate for the proportion...
a. Based on this sample, develop and
interpret a 95% confidence interval estimate for the proportion of
the traveling population that would have been impacted had the
one-bag limit been in effect. Determine the confidence
interval.
b. A certain plane has a capacity for 447 passengers. Determine
an interval estimate of the number of passengers that you would
expect to carry more than one piece of luggage on the plane. Assume
the plane is at its passenger capacity.
c. Suppose...
1.) A survey asks, "If the husband in a family wants children, but the wife decides...
1.) A survey asks, "If the husband in a family wants children, but the wife decides that she does not want any children, is it all right for the wife to refuse to have children?" Of 746 subjects, 568 said yes. A.) Find a 99% confidence interval for the population proportion who would say yes (Round to four decimal places) B.) Can you conclude that the population proportion exceeds 75%? 1.) No, we cannot conclude that the population proportion exceeds...
help with stat: A software developer wants to re-do the survey in #1 with the goal...
help with stat: A software developer wants to re-do the survey in #1 with the goal of estimating the proportion of NKU students who carry an iPhone using a 95% confidence interval. The developer wants her estimate to be within ± 3% of the true proportion. Calculate the minimum sample size she must gather to achieve that level of accuracy. Show work for partial credit.
Suppose a marketing company wants to determine the current proportion of customers who click on ads...
Suppose a marketing company wants to determine the current proportion of customers who click on ads on their smartphones. It was estimated that the current proportion of customers who click on ads on their smartphones is 0.64. How many customers should the company survey in order to be 95% confident that the margin of error is 0.21 for the confidence interval of true proportion of customers who click on ads on their smartphones? Please explain in detail how you get...
You have been asked by your new boss at Belk's to do a survey of customers...
You have been asked by your new boss at Belk's to do a survey of customers on their preference of the location of the customer service desk. She would like a 95% confidence interval with a margin of error of 0.09. How many people do you need to survey?
The 2010 General Social Survey asked 1,259 US residents: "Do you think the use of marijuana...
The 2010 General Social Survey asked 1,259 US residents: "Do you think the use of marijuana should be made legal, or not?" 48% of the respondents said it should be made legal. 1. The value 48% is a... A. population parameter B. sample statistic 2. Construct a 95% confidence interval for the proportion of US residents who think marijuana should be made legal, and interpret it in the context of the data. Round your results to four decimal places. (...
9. A group of statistics students decided to conduct a survey at their university to find...
9. A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a population standard deviation of three hours, what is the required sample size if the error should be less than a half hour with a 99% level of confidence? 10.University officials say that at least 70% of the voting student population supports a fee increase. If the 95% confidence interval estimating the...
11. + -/4.16 points ASWSBE14 8.E.035.MI. My Notes + Ask Your Teacher You may need to...
11. + -/4.16 points ASWSBE14 8.E.035.MI. My Notes + Ask Your Teacher You may need to use the appropriate appendix table or technology to answer this question. In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1,007 adults to learn about their major healthcare concerns. The survey results showed that 585 of the respondents lack confidence they will be able to afford health insurance in the future. (a) What is the point estimate of...
A veterinarian wants to know the average number of cats her customers own. She has her...
A veterinarian wants to know the average number of cats her customers own. She has her assistant, Margaret, take a random sample and construct a 95% confidence interval for the average: (1.35, 2.58). (a) What is the margin of error for the interval? (b) What should the veterinarian conclude about the test H0: μ = 2.72 vs. Ha: μ ≠ 2.72 at α = 0.05? She should ---- not reject reject not make a conclusion about the null hypothesis because ---- 2.72...
3 The manufacturer of Ice Melt claims that its product will melt snow ani KZ temperatures...
3 The manufacturer of Ice Melt claims that its product will melt snow ani KZ temperatures as low as O" Celsius. A representative for a large chain of hardware stores is interested in testing this claim. The chain purchases a large shipment of s kilo bags for distribution. The representative wants to know, with 95%cofdene and within :005 degrees, whal proportion of bugs of le Melt perfoum the jpb a claimed by the manu facturer. (15 points) a. How many...
a. Based on this sample, develop and
interpret a 95% confidence interval estimate for the proportion of
the traveling population that would have been impacted had the
one-bag limit been in effect. Determine the confidence
interval.
b. A certain plane has a capacity for 447 passengers. Determine
an interval estimate of the number of passengers that you would
expect to carry more than one piece of luggage on the plane. Assume
the plane is at its passenger capacity.
c. Suppose...
11. + -/4.16 points ASWSBE14 8.E.035.MI. My Notes + Ask Your Teacher You may need to use the appropriate appendix table or technology to answer this question. In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1,007 adults to learn about their major healthcare concerns. The survey results showed that 585 of the respondents lack confidence they will be able to afford health insurance in the future. (a) What is the point estimate of...
3 The manufacturer of Ice Melt claims that its product will melt snow ani KZ temperatures as low as O" Celsius. A representative for a large chain of hardware stores is interested in testing this claim. The chain purchases a large shipment of s kilo bags for distribution. The representative wants to know, with 95%cofdene and within :005 degrees, whal proportion of bugs of le Melt perfoum the jpb a claimed by the manu facturer. (15 points) a. How many...
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