Statistics for business - Week 8 assignment - Consider this hypothesis test H0 1 2 = 0 Ha 1 2 < 0 Here 1 is the population mean of Population 1 and 2 is

Statistics for business - Week 8 assignment - Consider this...

This preview shows page 1 - 4 out of 12 pages.

the statistics summarized from a simple random sample of each of the two populations to completethe following: (12 Points)Population 1Population 2Sample Size ( n)5060Sample mean (xbar)24.525.9Sample standard deviation (s)5.437.21a.Compute the test statistic tb.Compute the degree of freedom for the test statistic tc.What is the rejection rule using the p-value approach and α=0.05d.What is the p-value?e.Based on the rejection rule from c., what is your conclusion on the null hypothesis?f.Use the above data to construct a 95% confidence interval for the difference of the population meansNote that the population standard deviations are not known and therefore you cannot use the formula in Section 10.1. Use those in Section 10.2 instead.
Image of page 1
Image of page 2
Responses from a customer satisfaction survey for two stores of a local hardware chain were recorded in the attached BUSI1013-2 Independent Samples A.xlsfile. These responses, in the form of a satisfaction score, are taken from a random sample of customers who shopped recently at the two stores and are recorded on the scale of 1 to 10. The chain wants to use this data to test the research (alternative) hypothesis that the mean satisfaction score for the two branches is not the same. The null hypothesis is that the mean satisfaction score for the two branches is the same (10 Points)a.
Image of page 3
Image of page 4

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture