1. A survey of 800 women shoppers found that 17% of them shop onimpulse. What is
ID: 2914342 • Letter: 1
Question
1.
A survey of 800 women shoppers found that 17% of them shop onimpulse. What is the 98% confidence interval for the trueproportion of women shoppers who shop on impulse?
A) B) C) D)
2.
A sample of 25 different payroll departments found that theemployees worked an average of 310.3 days a year with a standarddeviation of 23.8 days. What is the 90% confidence intervalfor the average days worked, , of all payroll departments?
A)
C)
B)
D)
3.
What is the 90% confidence interval for the variance of examscores for 28 algebra students, if the standard deviation of theirlast exam was 12.7?
A)
C)
B)
D)
1.
A survey of 800 women shoppers found that 17% of them shop onimpulse. What is the 98% confidence interval for the trueproportion of women shoppers who shop on impulse?
A) B) C) D)