A concrete mix is designed to withstand 3000 pounds per square inch (psi) of pre

Question

A concrete mix is designed to withstand 3000 pounds per square inch (psi) of pressure. The following data represent the strength of nine randomly selected casts (in psi) Compute the mean, median and mode strength of the concrete (in psi) Compute the mean strength of the concrete. Select the correct choice below and, if necessary, fillin the answer box to complete your choice O A. The mean strength of the concrete is psi of pressure 3960, 4100, 3300, 3100, 2930, 3820, 4100, 4040, 3590 Round to the nearest tenth as needed) B. The mean does not exist Compute the median strength of the concrete Select the correct choice below and, if necessary, fil in the answer box to complete your choice. O A The medan strength of the concrete is psi of pressure O B. The median does not exist (Round to the nearest tenth as needed )

Explanation / Answer

Data in ascending order is : 2930, 3100, 3300, 3590, 3820, 3960, 4040, 4100, 4100

A) mean = (2930 + 3100 + 3300 + 3590 + 3820 + 3960 + 4040 + 4100 + 4100) / 9 = 3660

Option-A) the mean strength is 3660 psi of pressure.

B) median = middle most value = 3820

Option-A ) the Median strength of concrete is 3820 psi of pressure.

C) mode = data of highest frequency = 4100

Option-A) the mode of the strength of the concrete is 4100 psi of pressure .

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