A
beverage dispensing machine is calibrated so that the amount of beverage dispensed
is approximately normally distributed with a population standard deviation of
0.15 deciliters (dL). Compute a 95% confidence interval for the mean amount
of beverage dispensed by this machine based on a random sample of 36 drinks
dispensing an average of 2.25 dL. (State your answer as lower limit, upper limit).
Let's Do It! 10.17
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How large of a sample would you need if you want the
width of the 95% confidence interval to be 0.04?
Would a 90% confidence interval be wider or narrower
than the interval above.