Suppose the Internet retailer Buy. com would like to investigate the relationship between the amount of time in minutes a purchaser spends on its Web site and the amount of money he or she spends on an order. The ­following table shows the data from a random sample of 12 customers. These data can also be found in the Excel file Buy. com. xlsx.
a. Calculate the Spearman rank- order correlation coefficient.
b. Using a = 0.05, perform a hypothesis test to determine if the population rank correlation coefficient is different than zero.

  • CreatedJuly 29, 2015
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