Mathematics, 27.08.2021 22:40 daphnevlogs11
PNC bank introduced a $12 checking account fee July, 2019. To respond to customers who were very upset, management noted that this fee was one of the least compared to other banks. To confirm this claim, PNC selected a sample of 30 random bank customers. A sample of 30 customers paid an average of $12.55 per month on their interest-bearing accounts. Assume the population standard deviation is $1.75.
Required:
a. Construct a 95% confidence interval to estimate the average fee for the population.
b. What is the margin of error for this interval?
Answers: 2
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PNC bank introduced a $12 checking account fee July, 2019. To respond to customers who were very ups...
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