Mathematics, 17.07.2021 14:00, ctyrector

b) An achievement test was administered to a class of 20,000 students. The mean score was 80 and the standard deviation was 11. If Lingard scored 72 in the test, how many students did better than him

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b) An achievement test was administered to a class of 20,000 students. The mean score was 80 and the...