Question: Sanchez Electronics sells electronic components for car stereos. It claims that the average life of a component exceeds 4,000 hours. To test this claim, it

Sanchez Electronics sells electronic components for car stereos. It claims that the average life of a component exceeds 4,000 hours. To test this claim, it has selected a random sample of n = 12 of the components and traced the life between installation and failure. The following data were obtained:

a. State the appropriate null and alternative hypotheses.
b. Assuming that the test is to be conducted using a 0.05 level of significance, what conclusion should be reached based on these sample data? Be sure to examine the required normality assumption.

1,973 4.838 3.805 4.494 4.738 5,249 4.,459 4,098 4,722 5,894 3,322 4,800

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a b The normality assumption can be examined by looking at a box and whisker plot ... View full answer

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