. In a marketing survey, a random sample of 730 shoppers revealed that 628 remai

Question

. In a marketing survey, a random sample of 730 shoppers revealed that 628 remained loyal to their favorite supermarket during the past year (i.e., did not switch stores). () Wh is the population aud sauple? (b) What is the parameter and the statistic? (c) Find a 95% confidence interval for the parameter. Give a brief explanation of the meaning of the interval the interval. increase, do the confidence intervals increase in length? If so, why would this occur? (d) Find a 99% confidence interval for the parameter. Give a brief explanation of the meaning of (e) Compare the lengths of the confidence intervals for parts (c) and (d). As the confíidence levels

Explanation / Answer

a) Population is Proportion of people loyal to their favourite supermarket

Sample is proportion out of 730 people loyal to their favourite supermarket

b)

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