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Home Q & A Board Science-Related Homework Help Mathematics
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sdaggy1 sdaggy1
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6 years ago
A random sample of 121 checking accounts at a bank showed an average daily balance of 280 . The standard deviation of the population is known to be 66.
 a. Is it necessary to know anything about the shape of the distribution of the account balances in order to make an interval estimate of the mean of all the account balances? Explain.
  b. Find the standard error of the mean.
  c. Give a point estimate of the population mean.
  d. Construct an 80 confidence interval for the population mean.
  e. Construct a 95 confidence interval for the population mean.
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m7md9078m7md9078
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6 years ago
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sdaggy1 Author
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6 years ago
Brilliant ツ
Jodias
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Yesterday
Thanks
ediblefruitz
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2 hours ago
this is exactly what I needed
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