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) 3950, 4080, 3100, 3100, 2940, 3830, 4090, 4030, 3460 2 Compute the mean strength of the concrete The mean strength of the concrete is psi of pressure. (Type an integer or decimal. Round to the nearest tenth as needed.) Compute the median strength of the concrete The median strength of the concrete is psi of pressure Type an integer or decimal. Round to the nearest tenth as needed.) 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 psi of pressure. O B. The modes of the strengths of the concrete arepsi of pressure OC. The mode does not exist. : (Type an integer or a decimal. Round to one decimal place as needed.) Type integers or decimals. Round to one decimal place as needed. Use a comma to separate answers as needed.)

Explanation / Answer

Data in ascending order ,

2940, 3100, 3100, 3460, 3830, 3950, 4030, 4080, 4090

A) mean = (2940+3100+3100+3460+3830+3950+4030+4080+4090)/9 = 3620

B) median = middle most value = 3830

C) mode = the number for which frequency is highest = 3100

Option-A) the mode is 3100

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