A random sample of college professors is selected from all professors at a university. The following list give there ages.
66,41,40,41,31,54,47,49,41,24,58,67,59,43,63
63,54,45,50,25,31,60,48,40,38,35,40,37,24,45,61,30,31,44,23,39,46,31,31,59
To find the mean age of the college professors, we need to sum up all the ages and divide by the total number of professors.
66 + 41 + 40 + 41 + 31 + 54 + 47 + 49 + 41 + 24 + 58 + 67 + 59 + 43 + 63 + 63 + 54 + 45 + 50 + 25 + 31 + 60 + 48 + 40 + 38 + 35 + 40 + 37 + 24 + 45 + 61 + 30 + 31 + 44 + 23 + 39 + 46 + 31 + 31 + 59 = 1537
There are 38 professors in the sample.
So, the mean age of the college professors is 1537 / 38 ≈ 40.45.