A random sample of size n=5 was drawn from a normally distributed population and the confidence interval (92.2, 111.0) was calculated. Which sample values were used as a basis for the calculation?

a) 92,102,99,113,102 (correct solution but why?) b) 91, 102, 90, 103,105 c) 103,112,80,130,119 d) 88,101,82,97,72 e) 105, 109, 110, 95, 122