20. The mean score and the standard score in the Statistics test are respectively equal to 80 and 2.5, whereas in the Mathematics tests they are respectively equal to 70 and 2. If Beth got a. score of 85 in Statistics and a score of 75 in Mathematics, in which subject is her standing better assuming normality in both subjects? In an English test, the mean is 60 and the standard deviation is 6. Assuming the scores are normally distributed what percent of the scores is a. greater than 65? b. less than 70? between 50 and 65?

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