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 (n psi). 3950, 4100, 3300, 3200, 2930, 3840, 4100, 4030, 3670 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, fill in the answer box to complete your choice. The mean strength of the concrete is psi of pressure: (Round to the nearest tenth as needed.) The mean does not exist.

Explanation / Answer

The data arranged in the ascending order is:

(a) Mean = sum of data/number of data = 3680

(b) Median = middle value = 3840

(c) Mode = Most frequent value = 4100

2930 3200 3300 3670 3840 3950 4030 4100 4100

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