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

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). 3970?, 4090?, 3200?, 3100?, 2930?, 3840?, 4090?, 4030?, 3600 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.

A. The mean strength of the concrete is nothing psi of pressure. ?(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.

A. The median strength of the concrete is nothing 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.

A. The mode of the strengths of the concrete is nothing psi of pressure. ?(Round to the nearest tenth as? needed.)

B. The mode does not exist.

Explanation / Answer

2930, 3100, 3200, 3600, 3840, 3970, 4030, 4090, 4090

a) mean = (2930 + 3100 + 3200 + 3600 + 3840 + 3970 + 4030 + 4090 + 4090)/9 = 3650.0

b) median = 3840

c) mode = 4090

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