obtained, and the mean is 23.2 years with a standard deviation of 2.4 years. Suppose the process of taking random samples of size 12 is repeated 1,000 times and a histogram of the 1,000 sample means lengths is created. The mean of the sampling distribullon presented in the histogram will be approximately: a. 22.8 b. 23.2 c. 2.4 d. We do not have enough information to find the mean of the sampling distribution.