Mathematics, 17.02.2021 14:10 nghtcll
(b) A department store has 7,000 charge accounts. The comptroller takes a random sample of 36 of
the account balances and calculates the standard deviation to be N42.00. If the actual mean (1)
of the account balances is N175.00, what is the probability that the sample mean would be
between N164.50 and N185.50?
b. greater than N180.00?
less than N168.00?
a.
C.
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(b) A department store has 7,000 charge accounts. The comptroller takes a random sample of 36 of
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