Suppose That the Batting Average for All Major League Baseball

question 91

Short Answer

Suppose that the batting average for all major league baseball players after each team completes 100 games through the season is 0.248 and the standard deviation is 0.034.The null hypothesis is that American League infielders average the same as all other major league players.A sample of 46 players taken from the American League reveals a mean batting average of 0.255.What is the value of the test statistic,z (rounded to two decimal places)?

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