25. TIMSS Test On the Trends in International Mathematics and Science Study (TIMSS) test in a recent year, the United States scored an average of 508 (well below South Korea, 597; Singapore, 593; Hong...

25. TIMSS Test On the Trends in International

Mathematics and Science Study (TIMSS) test in a

recent year, the United States scored an average of 508

(well below South Korea, 597; Singapore, 593; Hong

Kong, 572; and Japan, 570). Suppose that we take a

random sample of n United States scores and that the

population standard deviation is 72. If the probability

that the mean of the sample exceeds 520 is 0.0985, what

was the sample size?

Aug 29, 2022

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