his Question: 10 pts 1 of 28 (1 complete) This Test: 280 pts possible Question H
ID: 3370782 • Letter: H
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his Question: 10 pts 1 of 28 (1 complete) This Test: 280 pts possible Question Help 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. 0 A. The mean strength of the concrete is | psi of pressure. 3960, 4100, 3100, 3100, 2930, 3820, 4080, 4050, 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. 0 A. The median strength of the concrete is psi of pressure. O 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. (Round to the nearest tenth as needed.) A. The mode of the strengths of the concrete is-psi of pressure. (Round to the nearest tenth as needed.) The mode does not exist. OB.Explanation / Answer
Data = 3960 4100 3100 3100 2930 3820 4080 4050 3620
Mean = sum of all elements / No. of elements
= 32760 / 9
= 3640
Median if no. of observations odd = ((n+1)/2) th term in ordered data
ordered data =2930 3100 3100 3620 3820 3960 4050 4080 4100
Median = (9+1)/2 = 5th term
= 3820
Mode = highest frequency element
Observation : 2930 3100 3620 3820 3960 4050 4080 4100
Freequency : 1 2 1 1 1 1 1 1
3100 occur 2 times i.e.maximum number of times.
Mode = 3100
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