What percentage of fourth graders score better

Reference no: EM131009398

A set of reading scores for fourth-grade children has a mean of 25 and a standard deviation of 5. A set of scores for ninth-grade children has a mean of 30 and a standard deviation of 10. Assume that the distributions are normal.

(a) Draw a rough sketch of these data, putting both groups in the same figure.

(b) What percentage of fourth graders score better than the average ninth grader?

Reference no: EM131009398

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