Consider again the statistics about human body temperature in Exercise 23.
a) Would a 90% confidence interval be wider or narrower than the 98% confidence interval you calculated before? Explain. (Don't compute the new interval.)
b) What are the advantages and disadvantages of the 98% confidence interval?
c) If we conduct further research, this time using a sample of 500 adults, how would you expect the 98% confidence interval to change? Explain.
d) How large a sample might allow you to estimate the mean body temperature to within 0.1 degrees with 98% confidence?
Summary Temperature
Count ………………….. 52
Mean …………………… 98.285
Median ………………… 98.200
MidRange ……………… 98.600
StdDev ………………… 0.6824
Range …………………… 2.800
IntQRange ……………… 1.050