10.21 An automobile industry uses a particular brand of automobile batteries that have their lifetimes approximately normally distributed, with a mean of 3.5 years and standard deviation of 0.5 years. Test the hypothesis that u = 3.5 years against the alternative, u 7 3.5 years, if a random sample of 32 batteries has an average life of 3.4 years. Use a P-value in your answer.

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Problem 10.21
-| A Read aloud V Draw
Highlic
ple of 49 bundles weighs 970 grams on average, with
a standard deviation of 70 grams. Test the hypothesis
that u = 1000 grams against the alternative hypothesis
of u < 1000 grams at the 0.05 level of significance.
%3D
10.21 An automobile industry uses a particular
brand of automobile batteries that have their lifetimes
approximately normally distributed, with a mean of
3.5 years and standard deviation of 0.5 years. Test the
hypothesis that u = 3.5 years against the alternative,
u # 3.5 years, if a random sample of 32 batteries has an
average life of 3.4 years. Use a P-value in your answer.
10.22 In the American Heart Association journal Hy-
pertension, researchers report that individuals who
practice Transcendental Meditation (TM) lower their
Transcribed Image Text:-| A Read aloud V Draw Highlic ple of 49 bundles weighs 970 grams on average, with a standard deviation of 70 grams. Test the hypothesis that u = 1000 grams against the alternative hypothesis of u < 1000 grams at the 0.05 level of significance. %3D 10.21 An automobile industry uses a particular brand of automobile batteries that have their lifetimes approximately normally distributed, with a mean of 3.5 years and standard deviation of 0.5 years. Test the hypothesis that u = 3.5 years against the alternative, u # 3.5 years, if a random sample of 32 batteries has an average life of 3.4 years. Use a P-value in your answer. 10.22 In the American Heart Association journal Hy- pertension, researchers report that individuals who practice Transcendental Meditation (TM) lower their
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