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, fill in the answer box to complete your choice. O A. The mean strength of the concrete is psi of pressure 3970, 4090, 3100, 3100. 2950. 3820. 4080, 4030. 3620 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, fill in the answer box to complete your choice. O A. The median strength of the concrete is 1 psi of pressure. Round to the nearest tenth as needed.) B. The median does not exist. Compute the mode strength of the concrete. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mode of the strengths of the concrete is-psi of pressure. (Round to the nearest tenth as needed.) B. The mode does not exist.

Explanation / Answer

Data in ascending order,

2950, 3100, 3100, 3620, 3820, 3970, 4030, 4080, 4090

A) mean = (2950 + 3100 + 3100 + 3620 + 3820 + 3970 + 4030 + 4080 + 4090) / 9 = 3640

Option-A) the mean strength of the concrete is 3640 psi of pressure.

B) median = middle most value = 5th number value = 3820

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

C) mode = the value which has highest frequency = 3100

Option-A) The mode of strength of the concrete is 3100 psi of pressure

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