An experimenter obtains on the basis of a sample of size 10

An experimenter obtains, on the basis of a sample of size 10, a 95% confidence interval estimate of mean height with confidence limits equal to 66 and 74 inches. Assuming his calculations are correct, this result also depends on which of the following assumptions: A. The mean heights are normally distributed, the sample is random and the critical values were obtained from the t-distribution. B. we have 95% confidence that a person’s height lies between 66 and 74 inches provided the data were randomly obtained and the critical values were obtained from a normal distribution. C. we have 95% confidence that the population mean height lies between 66 and 74 inches provided the data were randomly obtained and the critical values were obtained from a t- distribution. E. All of the above

Solution

E. All of the above

all are correct