A random sample of 25 bottles of buffered aspirin contain, on average, 325.5 mg of aspirin with a sample standard deviation of 0.5 mg. (a) Find a 95% two-sided confidence interval on the mean aspirin in milligram.(b) Construct a two-sided tolerance interval on the mean aspirin required that has confidence level 95% with 99% probability of coverage. (c) Construct a two-sided 95% prediction interval on the amount of aspirin of the 26th sample.

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the answer is 1/4

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7 is the median   7.875 is the mean

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3,4,5,6,8,11,13,13