Chapter 9 HW - Sample Size Sample Mean 120 8.4 PopulationSD...

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Sample Size 120 Sample Mean 8.4 Population SD 3.2 Hypothesized Value 8 Standard Error 0.29 Test Stat z 1.369 p-value (Lower Tail) 0.9145 p-value (Upper Tail) 0.0855 p-value (Two-Tail) 0.17090 0.05 p-value 0.17090 Decision Do not reject z-stat 1.96 lower 7.83 upper 8.97 significance level ( α )
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Sample Size 40 Sample Mean 118000 Population SD 30000 Hypothesized Value 125500 Standard Error 4743 Test Stat z -1.581 p-value (Lower Tail) 0.0569 p-value (Upper Tail) 0.9431 p-value (Two-Tail) 0.11385 0.05 p-value 0.11385 Decision Do not reject z-stat 1.96 significance level ( α )
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Price 4620 6210 5150 Sample Size 25 5250 Sample Mean 5835 4840 Sample SD 520 6320 5450 Hypothesized Value 5600 5620 6140 Standard Error 104 5850 Test Stat t 2.26 5640 Degrees of Freedom 24 6575 5940 p-value (Lower Tail) 0.9834 5850 p-value (Upper Tail) 0.0166 5825 p-value (Two-Tail) 0.0332 5820 6850 0.05 6010 p-value 0.0166 5960 Decision REJECT 5980 6330 t-stat 2.06 5990 5995 6360 5300 significance level ( α )
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Chapter 9 HW - Sample Size Sample Mean 120 8.4 PopulationSD...

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