question archive the manager at an automobile dealership would like to estimate the average satisfaction score from the 915 customers who purchased a car or truck last year
the manager at an automobile dealership would like to estimate the average satisfaction score from the 915 customers who purchased a car or truck last year
Subject:MathPrice: Bought3
the manager at an automobile dealership would like to estimate the
average satisfaction score from the 915 customers who purchased a car or truck last year. the company goal is to achieve an average satisfaction score of at least 80 on a scale of 0-100. a random sample of 80 customers had an average satisfaction score of 82.7 and a sample standard deviation of 6.7.
a) construct a 95% confidence interval to estimate the actual average satisfaction score from last years customer
b) based on this sample, can the manager conclude that the company goal has been achieved
