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The manager of the local health club is interested in determining the number of times members use the weight room per month. She takes a random sample of 15 members and finds that over the course of a month, the average number of visits was 11.2 with a standard deviation of 3.2. Assuming that the monthly number of visits is normally distributed, which of the following represents a 95% confidence interval for the average monthly usage of all health club members? O A. 11.2± 1.77 O B. 11.2+ 1.83 O C. 11.2± 1.74 O D. 11.2± 1.62

The manager of the local health club is interested in determining the number of times members use the weight room per month. She takes a random sample of 15 members and finds that over the course of a month, the average number of visits was 11.2 with a standard deviation of 3.2. Assuming that the monthly number of visits is normally distributed, which of the following represents a 95% confidence interval for the average monthly usage of all health club members? O A. 11.2± 1.77 O B. 11.2+ 1.83 O C. 11.2± 1.74 O D. 11.2± 1.62

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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The manager of the local health club is interested in determining the number of times members use the weight room per month. She takes a random sample of 15 members and finds that over the course of a month, the average number of visits was 11.2 with a standard deviation of 3.2. Assuming that the monthly number of visits is normally distributed, which of the following represents a 95% confidence interval for the average monthly usage of all health club members? O A. 11.2± 1.77 O B. 11.2 ± 1.83 O C. 11.2± 1.74 O D. 11.2 ± 1.62 NEVT D AGE DAGE here to search
Transcribed Image Text:The manager of the local health club is interested in determining the number of times members use the weight room per month. She takes a random sample of 15 members and finds that over the course of a month, the average number of visits was 11.2 with a standard deviation of 3.2. Assuming that the monthly number of visits is normally distributed, which of the following represents a 95% confidence interval for the average monthly usage of all health club members? O A. 11.2± 1.77 O B. 11.2 ± 1.83 O C. 11.2± 1.74 O D. 11.2 ± 1.62 NEVT D AGE DAGE here to search
Time left 1:34:54 A sample of 50 students is taken from Utah Valley University (UVU). These students spent an average of $175 on books this semester, with a standard deviation of $25. A 95% confidence interval for the average amount of money spent on books for all students at UVU is equal to (Hint: Use Excel function to obtain the critical value.) O A. 175+3.86 O B. 175±3.47 O C. 175+7.51 O D. 175 7.18 e here to search a
Transcribed Image Text:Time left 1:34:54 A sample of 50 students is taken from Utah Valley University (UVU). These students spent an average of $175 on books this semester, with a standard deviation of $25. A 95% confidence interval for the average amount of money spent on books for all students at UVU is equal to (Hint: Use Excel function to obtain the critical value.) O A. 175+3.86 O B. 175±3.47 O C. 175+7.51 O D. 175 7.18 e here to search a
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