Determine the probability of getting a sample mean

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Question: A food manufacturing company claims that the actual average protein content in their protein bars is 20 grams. To investigate this claim, a sample of 25 protein bars from different batches are collected. The average and standard deviation of the samples are measured as 18 and 2 grams, respectively.

a) Determine the probability of getting a sample mean result as low or lower than 18 grams, assuming the actual mean is 20 grams. Write necessary assumption(s).

b) What does this answer imply about the claim that actual mean is 20 grams?

Reference no: EM133651011

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