Which of the following will make a confidence interval narrower? (Check all that apply)Increasing the sample meanA smaller population standard deviationIncreasing the confidence levelIncreasing the sample size

Answer:- Which of the following will make a confidence interval narrower?

Answered: Which of the following will make a…

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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"e this 1 k Listed below are student evaluation ratings of courses, where a rating of 5 is for "excellent." The ratings were obtained at one university in a state. Construct a confidence interval using a 95% confidence level. What does the confidence interval tell about the population of all college students in the state? 3.9, 2.9, 4.3, 4.7, 3.1, 3.9, 3.4, 4.4, 4.0, 4.4, 4.2, 3.5, 3.2, 4.1, 3.6 p E What is the confidence interval for the population mean µ? << ] (Round to two decimal places as needed.) C View an example R ما Get more help - A م - B كل 6 الكل N M hp '9 K الالالالا ــالــالــالك الالال O alt ( ... ) ctri < Clear all Check answer و -- به 611 6II FM 10/20/2022
Class Mean Standard Deviation N Lower 12.11 2.83 122 Working 13.01 2.91 541 Middle 14.99 2.93 475 Upper 15.44 2.83 34 As our confidence in the result increases, how does the size of the confidence interval change?
You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 15 randomly selected college students. Round answers to 3 decimal places where possible. 3 10 11 6. 8 11 3 12 12 6, 8 12 a. To compute the confidence interval use a ? v distribution. b. With 90% confidence the population mean number of days of class that college students miss is between and days. C. If many groups of 15 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of missed class days and about percent will not contain the true population mean number of missed class days.
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You are interested in finding a 95% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 13 randomly selected college students. Round answers to 3 decimal places where possible. 4 11 11 7 10 7 9 2 8 11 9 4 12 a. To compute the confidence interval use a distribution. b. With 95% confidence the population mean number of days of class that college students miss is between and days. c. If many groups of 13 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of missed class days and about percent will not contain the true population mean number of missed class days.
You are interested in finding a 98% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 14 randomly selected college students. Round answers to 3 decimal places where possible. 12 5 7 4 6 9 11 11 9 8 5 9 10 11 a. To compute the confidence interval use a distribution. b. With 98% confidence the population mean number of days of class that college students miss is between and days. c. If many groups of 14 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of missed class days and about percent will not contain the true population mean number of missed
USE 3 DECIMALS A researcher believes that reading habit of newspaper is decreasing every year. In order to see the true population proportion of people who are reading newspaper s/he collect a randomly selected people on the yearly basis. The following table gives the number of people who do not read newspaper with respect to the years. Construct a 90 % confidence interval for the true population proportion difference of people who are reading newspaper in 2005 and 2010. (P2005 - P2015) 2010 2005 In 1200 1000 Number of people who do not read newspaper 300 400 KOnceki
You are interested in finding a 95% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 11 randomly selected college students. Round answers to 3 decimal places where possible. 7 7 7 8 2 6 9 9 4 5 7 a. To compute the confidence interval use a distribution. b. With 95% confidence the population mean number of days of class that college students miss is between___ and____ days. c. If many groups of 11 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About___ percent of these confidence intervals will contain the true population mean number of missed class days and about___ percent will not contain the true population
Constructing a Confidence Interval when the Population o is Unknown A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of time they last is approximately normal but the population mean and standard deviation are not known. Researchers in a hospital used the drug on a random sample of nine patients. The sample mean was 2.51 hours. The sample standard deviation was 0.318. Work to construct a 95% confidence interval for the population mean by providing the following information. Useful tool: Student's t-Distribution Calculator (Include three decimal places below) а. а — b. v = c. to.025 d. EBM e. The lower bound of the Confidence Interval is f. The upper bound of the Confidence Interval is
A sample is used to construct a confidence interval for an unknown population Which of the following is the least likely to result in a decrease in the margin of error? Increasing the sample size Increasing the confidence level Decreasing the confidence level A change in the standard deviation of the
You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 15 randomly selected college students. Round answers to 3 decimal places where possible. 6 9 10 7 6 5 1 9 2 3 2 1 2 8 6 a. To compute the confidence interval use a distribution. b. With 90% confidence the population mean number of days of class that college students miss is between and days. c. If many groups of 15 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of missed class days and about percent will not contain the true population mean number of missed class days.

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Which of the following will make a confidence interval narrower? (Check all that apply) Increasing the sample mean A smaller population standard deviation Increasing the confidence level Increasing the sample size