During the Early Part of the 1994 Baseball Season,many Sports

Multiple Choice

During the early part of the 1994 baseball season,many sports fans and baseball players noticed that the number of home runs being hit seemed to be unusually large.The numbers of home runs by American League and National League teams based on the team-by-team statistics on home runs hit through Friday,June 3,1994,are given below (from the Columbus Dispatch,Sunday,June 5,1994) .

The mean and standard deviation of the number of home runs hit by National League teams are 50 and 11,respectively.Suppose we wish to measure how many more home runs than last year's average of 40 these teams have had this year by subtracting 40 from each number (a team with 55 home runs has 55 - 40 = 15 more home runs than last year's average) .What are the mean and standard deviation of these new numbers?

A) 50 and 11
B) 10 and 11
C) 50 and -29
D) 10 and -29