[Solution Library] A manufacturer of batteries claims its batteries last an average of 7 hours when used in a particular toy. For a sample of 20 batteries, the
Question: 1. A manufacturer of batteries claims its batteries last an average of 7 hours when used in a particular toy. For a sample of 20 batteries, the mean life was 6.5 hours and the standard deviation 1.5. Can we conclude with 95% certainty that the mean life for all batteries of that brand is less than 7 hours?
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![[Steps Shown] In order to compare the](/images/solutions/MC-solution-library-50391.jpg "[Steps Shown] In order to compare the average life of two brands")
[Steps Shown] In order to compare the average life of two brands
![[See Solution] For the hypotheses: Ho:u=5 Hl:u>5](/images/solutions/MC-solution-library-50392.jpg "[See Solution] For the hypotheses: Ho:u=5 Hl:u>5 If the p value is")
[See Solution] For the hypotheses: Ho:u=5 Hl:u>5 If the p value is
Solution: For the hypotheses: H 0 : μ = 5 Ha: μ > 5 If the
![[Step-by-Step] A computer manufacturer claims the average](/images/solutions/MC-solution-library-50394.jpg "[Step-by-Step] A computer manufacturer claims the average life")
[Step-by-Step] A computer manufacturer claims the average life
(Solution Library) Out of a sample of 1200 people, 650 indicated they
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