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a. Construct a 95% confidence interval estimate for the population mean number of days between the receipt of a complaint and the resolut The 95% confidence interval estimate is from 28.8 days to 51.8 days. (Round to one decimal place as needed.) b. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)?

a. Construct a 95% confidence interval estimate for the population mean number of days between the receipt of a complaint and the resolut The 95% confidence interval estimate is from 28.8 days to 51.8 days. (Round to one decimal place as needed.) b. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 11PPS
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A large family-held department store had the business objective of improving its response to complaints. The variable of interest was define between when the complaint was made and when it was resolved. Data were collected from 40 complaints that were made in the last year. U (a) through (d) below. E Click the icon to view the data table. a. Construct a 95% confidence interval estimate for the population mean number of days between the receipt of a complaint and the resolut The 95% confidence interval estimate is from 28.8 days to 51.8 days. (Round to one decimal place as needed.) b. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)? OA. The number of complaints per day is normally distributed. B. The number of complaints per day folaws the t distribution. OC. The number of days to resolve complaints is normally distributed. O D. The number of days to resolve complaints follows the t distribution. Days Between Complaint and Resolution of Complaint 37 90 26 48 43 26 17 103 29 25 152 13 8. 43 18 25 29 118 68 48 3 16 119 63 99 22 22 13 56 10 24 11 47 21 19 48 35 8.
Transcribed Image Text:A large family-held department store had the business objective of improving its response to complaints. The variable of interest was define between when the complaint was made and when it was resolved. Data were collected from 40 complaints that were made in the last year. U (a) through (d) below. E Click the icon to view the data table. a. Construct a 95% confidence interval estimate for the population mean number of days between the receipt of a complaint and the resolut The 95% confidence interval estimate is from 28.8 days to 51.8 days. (Round to one decimal place as needed.) b. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)? OA. The number of complaints per day is normally distributed. B. The number of complaints per day folaws the t distribution. OC. The number of days to resolve complaints is normally distributed. O D. The number of days to resolve complaints follows the t distribution. Days Between Complaint and Resolution of Complaint 37 90 26 48 43 26 17 103 29 25 152 13 8. 43 18 25 29 118 68 48 3 16 119 63 99 22 22 13 56 10 24 11 47 21 19 48 35 8.
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