Help me solve this plese

Anonymous
timer Asked: Jun 4th, 2015

Question description

BIG Corporation advertises that its light bulbs have a mean lifetime, , of at least hours. Suppose that we have reason to doubt this claim and decide to do a statistical test of the claim. We choose a random sample of light bulbs manufactured by BIG and find that the mean lifetime for this sample is hours and that the sample standard deviation of the lifetimes is hours.

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