The scores of a certain population on the Wechsler Intelligence Scale for Children (WISC) are thought to be Normally distributed, with mean μ μ and standard deviation σ = 10 σ=10 . A simple random sample of 25 children from this population is taken and each is given the WISC. The mean of the 25 scores is ¯ x = 104.32 x¯=104.32 . Based on these data, a 95% confidence interval for μ μ is: a. 104.32±19.60
b. 104.32±3.92
c. 104.32±3.29
d. 104.32±0.78
.