wwall7
wwall7
03.04.2020 • 
Mathematics

A study considers if the mean score on a college entrance exam for students in 2005 is any different from the mean score of 498 for students who took the same exam in 1975. Let u represent the mean score for all students who took the exam in 2005. For a random sample of 40,000 students who took the exam in 2005, the sample mean, x-bar = 496 and the sample standard deviation s = 100. Report the value of the test statistic.

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