Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is normally distributed with mean 2.61 and standard deviation 0.82. (a) if a random sample of 25 specimens is selected, what is the probability that the sample average sediment density is at most 3.00? between 2.61 and 3.00

The probability that the sample average sediment density is at most 3.00 = 0.9913

The probability that the sample average sediment density is between 2.61 and 3.00 = 0.4913

Explanation:

Given : Mean :

Standard deviation :

Sample size :

The value of z-score is given by :-

a) For x= 3.00

The p-value :

b) For x= 2.61

The p-value :

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more than, less

less than, more