You may need to use the appropriate appendic table or technology to answer this question A random sample of 121 checking

[answerhappygod]

You May Need To Use The Appropriate Appendic Table Or Technology To Answer This Question A Random Sample Of 121 Checking 1 (23.86 KiB) Viewed 20 times

You may need to use the appropriate appendic table or technology to answer this question A random sample of 121 checking accounts at a bank showed an average daily balance of $275. The standard deviation of the population is known to be $77. (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? Expla O Yes, the sample is large and the standard deviation of the population is known so we ales need to know that the shape of the distibution is at least approximately be shaped O No, the standard deviation is larger than the mean so we do not need to know anything about the shape of the distribution O No, the sample is large and the standard deviation of the population is known so we do not need to know anything about the shape of the distribution know anything about the shape of the distribution O No, the mean is larger than the standard deviation so we do not need OYes, the mean is larger than the standard deviation so we also t that the shape of the distribution is at least apprimately be shaped (b) Find the standard error of the mean On dollars). (c) Give a point estimate of the population mean (in dollars) (d) Construct an 80% confidence interval for the population mean (in dollars), (Round your answers to the nearest cont.) s to $ (e) Construct a 95% confidence interval for the population maan (in dolar) (und your answers to the nearest cent) to s