Answer (Choose 1 answer)
A local bank needs information concerning the checking account balances of its customers. A random sample of 15 accounts was checked. The mean balance was 686.75 with a standard deviation of 256.20.Find a 98% confidence interval for the true mean. Assume that the account balances are normally distributed.
A. (238.23, 326.41)
B. None of the other choices is correct
C. (487.31, 563.80)
D. (513.17, 860.33)
Ε. (326.21, 437.90)
E14
Let 20.01=2.326, 2002 = 2.054 10.01.14 2.624, 10.02.14 = 2.264
