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According to a survey, only 15% of customers who visited the web site of a major retail store made a purchase. Random sa
Posted: Thu May 05, 2022 8:12 pm
by answerhappygod
- According To A Survey Only 15 Of Customers Who Visited The Web Site Of A Major Retail Store Made A Purchase Random Sa 1 (93.14 KiB) Viewed 31 times
According to a survey, only 15% of customers who visited the web site of a major retail store made a purchase. Random samples of size 50 are selected. Answer the following questions: a) What is the mean and standard error of the sampling distribution for the proportion of customers who made purchases? Mean Standard error b) what is the probability that the sample proportion will fall between 20% and 30% ? c) what is the probability that the sample proportion will be at least 30% ? d) What is the percentage below which 90% of the sample proportions would fall?