Homework Set #5/97

hypothesized value. The P-value is then equal to the area under the z-curve and to the left of -2.61. From looking at the Z-table (Table II of Weiss), the P-value = 0.0045. Using a 0.01 significance level Ho would be rejected (since 0.0045 < 0.01), suggesting that the. mean usage was lower. ................
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