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A manufacturer claims that his television will have an average lifetime of five years. 81 televisions are selected at random, and their average lifetime was

A manufacturer claims that his television will have an average lifetime of five years. 81 televisions are selected at random, and their average lifetime was found to be 59 months and standard deviation is seven months.Is the manufacturer correct atalpha=0.01.a) Give H0 and H1.b) find the test statistic.c) Find the critical value.d) What is the decision.

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