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The following data summarizes a study of online expenditures of groups of male and female customers for a particular web store. The population...

 The following data summarizes a study of online expenditures of groups of male and female customers for a particular web store. The population variances are known to be equal.  

a.   Test whether the average expenditures of men are higher than women using alpha 0.10.

b.    Test that the standard deviation of male customers is more than $94. Use alpha = 0.10. 

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a.   Test whether the average expenditures of men are higher than women using alpha 0.10. We want to test Ho: µ 1 < µ... View the full answer

2 comments
  • what does Sp mean
    • mollyg55
    • Apr 04, 2018 at 4:15pm
  • pooled variance. its used when we assume that population variance are equal.
    • Stat.Solve
    • Apr 04, 2018 at 4:25pm

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