1. To estimate the mean amount of paint in all 1-gal cans with 95% confidence to within .004 gals, what sample size is required? 2. 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: 72 68 81 93 56 19 79 94 83 84 77 69 85 97 75 71 86 47 66 88 At the .05 level of significance does this information indicate that the lifetime years of residents of Hawaii are decreasing. T-Test of the Mean Test of mu = 77.00 vs mu < 77.00 Variable N. Mean StDev SE Mean T P Lifespan 20 74.45 18.09 4.05 -0.63 0.27 State the meaning of µ, and then list the 5 steps of the p value decision rule.
1. To estimate the
2. 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:
72 68 81 93 56 19 79 94 83 84 77 69 85 97 75 71 86 47 66 88
At the .05 level of significance does this information indicate that the lifetime years of residents of Hawaii are decreasing.
T-Test of the Mean
Test of mu = 77.00 vs mu < 77.00
Variable N. Mean StDev SE Mean T P
Lifespan 20 74.45 18.09 4.05 -0.63 0.27
State the meaning of µ, and then list the 5 steps of the p value decision rule.
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