Ch_10.1_Means_of_2_Pop - Ch 10.1 Comparing Means of Two Independent Populations 1(EX 10.1 p 369 A local pizza restaurant located close to a college

Ch_10.1_Means_of_2_Pop - Ch 10.1 Comparing Means of Two...

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Ch 10.1 : Comparing Means of Two Independent Populations 1. (EX 10.1 p 369) A local pizza restaurant located close to a college campus advertises that their delivery time to a college dormitory is less than that of a local branch of a national pizza chain. In order to determine the validity of this claim, you and some friends have decided to order 10 pizzas from the local restaurant and 10 pizzas from the national chain, all at different times. The delivery times, in minutes, are given in the file PIZZATIME. At the 0.05 level of significance, is there evidence that the mean delivery time is lower for the local pizza restaurant

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Unformatted text preview: than for the national pizza chain? Assume that the population variances of the delivery times for each pizza place are approximately equal. Results for: Pizza1.MTW Two-Sample T-Test and CI: local, chain Two-sample T for local vs chain N Mean StDev SE Mean local 10 16.70 3.10 0.98 chain 10 18.88 2.87 0.91 Difference = mu (local) - mu (chain) Estimate for difference: -2.18000 95% upper bound for difference: 0.13336 T-Test of difference = 0 (vs &lt;): T-Value = -1.63 P-Value = 0.060 DF = 18 Both use Pooled StDev = 2.9831...
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• Spring '12
• webber
• Statistics, local pizza restaurant, national pizza chain

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