(c) Longevity: Honolulu USA 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 gave the following information about life span (in years) of Honolulu residents: 81 85 72 56 75 68 93 19 78 94 83 84 69 97 71 86 47 66 27 i. Compute the mean and standard deviation. Round off the mean to one decimal place and two decimal places for the standard deviation. Assuming that the life span in Honolulu is approximately normally distributed, does this information indicate that the population mean life span for Honolulu residents is less than 77 years? Use 5% level of significance. ii.

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