One important statistic in baseball is a pitcher\'s earned run average, or ERA.

Question

One important statistic in baseball is a pitcher's earned run average, or ERA. This number represents the average number of earned runs given up by the pitcher per nine following table lists the ERAs for pitchers playing for the New York Yankees and the Baltimore Orioles as of July 22, 2010 s. The ERA BO 3.13 Guthrie 2.88 Millwood 4.99 Matusz 3.99 Bergeson 4.68 Hernandez 580 Berken Bumet 4.29 2.50 5 23 Chamberlain 0.98 Albers 4.86 Arrieta 5.93 Simon 2.88 Ohman 392 Tillman 4 87 3.14 2 57 7.92 7.79 5.40 2 92 10.13 6 52 7 36 18.00 Park Mitre 3UU Meredith 7.50 Uehara 9.00 Castillo 5.40 Johnson Aceves Gonzalez SOURCE: http://www.mlb.com n and the median ERAs for the New York Yankees. Be sure to use the narm TRUE option, which tells R to remember to first use the library(openx1sx) command. (Round your answers to 2 decimal places.) ignore the a. Use the mean and median commands in R to calculate the meda missing values. If you want to read into R the above Excel file, 556 PM /10/2018 O Type here to search

Explanation / Answer

from above: putting data in ascending order:

a)

mean =4.70

median =(n+1)/2 th value =9 th value =4.68

b)

mean =6.05

median =(n+1)/2 th value =10 th value =5.23

c)

New York Yankees

S. No New York Yankees S. No Blatimore Orioles 1 0.98 1 2.5 2 2.88 2 2.57 3 2.88 3 2.92 4 3 4 3.14 5 3.13 5 4.29 6 3.92 6 4.31 7 3.99 7 4.58 8 4.08 8 4.87 9 4.68 9 5.21 10 4.86 10 5.23 11 4.99 11 5.4 12 5.4 12 5.77 13 5.8 13 6.51 14 5.93 14 6.52 15 6.81 15 7.36 16 7.5 16 7.79 17 9 17 7.92 mean 4.695882 18 10.13 19 18 mean 6.053684

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