Which standard deviation would give you a better grade

Reference no: EM13900225

1. A distribution of exam scores has a mean of µ 5 78.

a. If your score is X = 70, which standard deviation would give you a better grade: s =4 or s = 8?

b. If your score is X = 80, which standard deviation would give you a better grade: s = 4 or s = 8?

2. For each of the following, identify the exam score that should lead to the better grade. In each case, explain your answer.

a. A score of X = 74 on an exam with M = 82 and s = 8; or a score of X = 40 on an exam with µ= 50 and s = 20.

b. A score of X = 51 on an exam with µ = 45 and s = 2; or a score of X = 90 on an exam with µ = 70 and s = 20.

c. A score of X = 62 on an exam with µ = 50 and s = 8; or a score of X = 23 on an exam with µ = 20 and s = 2.

Reference no: EM13900225

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