A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 14 accounts was checked and yielded a mean balance of $664.14 and a standard deviation of S 297.29. Find a 90% confidence interval for the true mean checking account balance for local customers.

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A savings and loan association needs information concerning the
checking account balances of its local customers. A random sample of
14 accounts was checked and yielded a mean balance of $664.14 and
a standard deviation of S 297.29. Find a 90% confidence interval for
the true mean checking account balance for local customers.
Select one:
a. 492.52 to 835.76
b. 455-65 to 872.63
C. 493-71 to 834-57
d. 523.43 to 804.85
Transcribed Image Text:A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 14 accounts was checked and yielded a mean balance of $664.14 and a standard deviation of S 297.29. Find a 90% confidence interval for the true mean checking account balance for local customers. Select one: a. 492.52 to 835.76 b. 455-65 to 872.63 C. 493-71 to 834-57 d. 523.43 to 804.85
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