The management of Stellenbosch Breweries claims that the average monthly salary earned by employees at SAB breweries exceeds R25 000. To test this claim a sample of 80 employees from SAB was chosen. The sample average monthly salary was found to be R25 250 with a standard deviation R1 450. The rejection region at a 1% significance level (rounded off to three decimals) is: A. {Z|Z<-2.325 and Z>2.325} B. {Z|Z>2.325} C. {Z|Z<-2.575 and Z>2.575} D. {Z|Z<-2.325}
The management of Stellenbosch Breweries claims that the average monthly salary earned by employees at SAB breweries exceeds R25 000. To test this claim a sample of 80 employees from SAB was chosen. The sample average monthly salary was found to be R25 250 with a standard deviation R1 450. The rejection region at a 1% significance level (rounded off to three decimals) is: A. {Z|Z<-2.325 and Z>2.325} B. {Z|Z>2.325} C. {Z|Z<-2.575 and Z>2.575} D. {Z|Z<-2.325}
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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The management of Stellenbosch Breweries claims that the average monthly salary earned by employees at SAB breweries exceeds R25 000. To test this claim a sample of 80 employees from SAB was chosen. The sample average monthly salary was found to be R25 250 with a standard deviation R1 450. The rejection region at a 1% significance level (rounded off to three decimals) is:
A. {Z|Z<-2.325 and Z>2.325}
B. {Z|Z>2.325}
C. {Z|Z<-2.575 and Z>2.575}
D. {Z|Z<-2.325}
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