Today reported that the state with the longest mean life span is Hawaii, where
the population mean life span is 77 years.
A random sample of 20 obituary notices in the Honolulu Advertizer had a
mean of = 71.4
years and a standard deviation, s = 20.65 yrs.
Assuming that life span in Honolulu is approximately normally
distributed , does this information indicate that the population life span for
Honolulu residents is less than 77 years?
Use a 5% level of significance.