Statistics
Matching exercise
Match the items on the right to the items on the left.
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. What is the excluded number
If the mean of x, x + 3, x + 5, x + 7 and x + 10 is 9 then what is the means of last three observations?
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is:
The mean of 20 numbers is 40. If 5 is subtracted from every number, what will be the new mean?
36
34/3
38
35