Question: please explain your answer well and the formulas you use 39. The amount of beryllium in a substance is often determined by the use of

please explain your answer well and the formulas you use 39.

please explain your answer well and the formulas you use

39. The amount of beryllium in a substance is often determined by the use of a photometric filtration method. If the weight of the berylium is , then the value given by the photometric filtration method is normally distributed with mean 11 and standard deviation ?. A total of eight independent measurements of 3.180 mg of beryllium gave the following results 3.166, 3.192, 3.175, 3.180,3.182,3.171,3.184,3.177 Use the preceding data to (a) estimated (b) find a 90 percent confidence interval estimate of

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