1. A marketing researcher wants to estimate the mean amount spent ($) on Amazon.com by Amazon Prime member shoppers. Suppose a random sample of 100 Amazon Prime member shoppers who recently made a purchase on Amazon.com yielded a mean of $1,500. a.Suppose the standard deviation of the amount spent ($) on Amazon.com is $200. Construct a 95% confidence interval estimate for the mean spending for all Amazon Prime member shoppers. b.Suppose the standard deviation of the amount spent ($) on Amazon.com is unknown. So, you calculate the standard deviation of this random sample of 100 Amazon Prime member shoppers, which is $200. Construct a 95% confidence interval estimate for the mean spending for all Amazon Prime member shoppers. 2. In a survey of 529 travelers, 386 said that location was most important in choosing a hotel. Construct a 90% confidence interval estimate for the population proportion of travelers who said that location was most important for choosing a hotel.
