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A researcher at a medical college conducted a study of 60 randomly selected male soccer players and concluded that frequently heading the ball in soccer

A researcher at a medical college conducted a study of 60 randomly selected male soccer players and concluded that frequently "heading" the ball in soccer lowers players' IQs. The soccer players were divided into two groups, based on whether they averaged 10 or more headers per game. Mean IQs were reported in the article, but the sample sizes and standard deviations were not given. Suppose that these values were as given in the accompanying table. (Use a statistical computer package to calculate theP-value. Usefewer than 10 headers10 headers.Round your test statistic to two decimal places, your df down to the nearest whole number, and theP-value to three decimal places.)

n Sample Mean Sample sd
Fewer Than 10 Headers 36 112 10
10 or More Headers 24 103 8

t =
df =
P =

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