Answer: 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
Step-by-step 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 :
