A study asked respondents, "If ever married, how old were you when you first married?" The results are summarized in the technology excerpt that follows. Complete parts (a) through (d) belo One-Sample T: AGEWED Mean StDev SE Mean Variable N 95.0% CI AGEWED 26970 22.530 4.712 0.029 (22.474, 22.586) E Click the icon to view the table of critical t-values. (a) Use the summary to determine the point estimate of the population mean and margin of error for the confidence interval. x = 22.530 (Type an integer or a decimal. Do not round.) E = 0.056 (Type an integer or a decimal. Do not round.) (b) Interpret the confidence interval. A. One can be 95% confident that the mean age of people when first married is between 22.474 and 22.586 years. O B. There is a 95% probability that the mean age of people when first married is between 22.474 and 22.586 years. O C. There is a 95% probability that the mean age of people when first married is 22.530 years. O D. One can be 95% confident that the mean age of people when first married is 22.530 years. (c) Verify the results by computing a 95% confidence interval with the information provided. Begin with the lower bound. 4.712 22.530 1.96 • = 22.474 V 26970 (Round to three decimal places as needed.) Next find the upper bound. 4.712
A study asked respondents, "If ever married, how old were you when you first married?" The results are summarized in the technology excerpt that follows. Complete parts (a) through (d) belo One-Sample T: AGEWED Mean StDev SE Mean Variable N 95.0% CI AGEWED 26970 22.530 4.712 0.029 (22.474, 22.586) E Click the icon to view the table of critical t-values. (a) Use the summary to determine the point estimate of the population mean and margin of error for the confidence interval. x = 22.530 (Type an integer or a decimal. Do not round.) E = 0.056 (Type an integer or a decimal. Do not round.) (b) Interpret the confidence interval. A. One can be 95% confident that the mean age of people when first married is between 22.474 and 22.586 years. O B. There is a 95% probability that the mean age of people when first married is between 22.474 and 22.586 years. O C. There is a 95% probability that the mean age of people when first married is 22.530 years. O D. One can be 95% confident that the mean age of people when first married is 22.530 years. (c) Verify the results by computing a 95% confidence interval with the information provided. Begin with the lower bound. 4.712 22.530 1.96 • = 22.474 V 26970 (Round to three decimal places as needed.) Next find the upper bound. 4.712
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 30PPS
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