In a study of 265 subjects,the average score on the examination was 63.8 and s = 3.08.What is a 95 percent confidence for µ?
A)[63.59 64.01]
B)[57.76 69.84]
C)[63.43 64.17]
D)[63.56 64.04]

Question

Quizplus · Accepted Answer

The 95% confidence interval for the mean is calculated using the formula: mean ± (Z * (s/√n)). Here, the mean is 63.8, s is 3.08, n is 265, and Z for 95% confidence is approximately 1.96. This calculation gives the interval [63.43, 64.17].

In a Study of 265 Subjects,the Average Score on the Examination