Population average examination score

Reference no: EM1395949

A random sample of 25 statistics examinations was taken. The average score in the sample was 76 with a variance of 144. Assuming the scores are normally distributed, the 99% confidence interval for the population average examination score is:

a) 70.02 to 81.98

b) 69.82 to 82.18

c) 70.06 to 81.94

d) 69.48 to 82.52

Reference no: EM1395949

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Population average examination score : A random sample of 25 statistics examinations was taken. The average score in the sample was 76 with a variance of 144. Assuming the scores are normally distributed, the 99% confidence interval for the population average examination score is:

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