The mean score in the test is 75, and the standard deviation is 15. Determine the z-test score of David, who scored 90 in the test. Given, The population mean, μ= 75 Population standard deviation, ơ = 15 Therefore, the z-test statistics can be
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math is the study of numbers, shapes, and patterns. It is used in everyday life, from counting to measuring to more complex calculations.
The formula to calculate the test statistic comparing two population means is, Z= ( x – y )/√(σx2/n1 + σy2/n2). In order to calculate the statistic, we must calculate the sample means (
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