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Claim allowing for a probability of a type i error

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Reference no: EM131954271

Duracell batteries claim that their AA size batteries have an average life longer than 15 hours*. A sample of 9 mechanical boxing kangaroos is tested using the Duracell batteries with the following life times recorded in hours:

16.5

14.8

15.3

16.8

14.8

14.6

15.9

16.1

14.7

It is known from past test records that the lifetime of Duracell AA battery is normally distributed with a standard deviation (s) of 0.6 hour. Based on the above information, test Duracell's claim allowing for a probability of a Type I error of 1% using:

(a) the p-value approach, and, (b)   the critical value approach

Reference no: EM131954271

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