Question:

A major razor blade manufacturer advertises that its twin-blade disposable razor "gets you lots more shaves" than any single-blade disposable razor on the market. A rival company that has been very successful in selling single-blade razors plans to test this claim. Independent random samples of eight single-blade users and eight twin-blade users are taken, and the number of shaves that each gets before indicating a preference to change blades is recorded. Do the data support the twin-blade manufacturer’s claim? α=.05. This is a t-tests independent samples.

Twin Blades                Single Blades

8                                10

17                                  6

9                                  3

11                                  7

15                                13

10                                14

6                                  5

12                                  7

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Solution: The downloadable solution consists of 4 pages
Deliverable: Word Document