Be sure to determine correctly whether the confidence intervals are calculated with the normal distribution or the
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A manufacturer of AAA batteries wants to estimate the mean life expectancy of the batteries. A sample of 25 such batteries shows that the distribution of life expectancies is roughly normal with a mean of 44.25 h and a standard deviation of 2.25 h. Construct a 98% confidence interval for the mean life expectancy of all the AAA batteries made by this manufacturer. Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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