A manufacturer claims that his television will have an average lifetime of at least five years. The standard
deviation is seven months. 81 televisions are selected at random, and their average lifetime was found to
be 59 months. Is the manufacturer correct? Use $$\alpha = 0.025$$

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The Answer of A manufacturer claims that his television will have an average lifetime of at least five years. The standard
deviation is seven months. 81 televisions are selected at random, and their average lifetime was found to
be 59 months. Is the manufacturer correct? Use $$\alpha = 0.025$$

A Manufacturer Claims That His Television Will Have an Average α=0.025\alpha = 0.025α=0.025

A Manufacturer Claims That His Television Will Have an Average $\alpha = 0.025$