10.30 In Dallas, some preempt trucks were mixed yellow(a) (instead of florid) to heighten their visibility. During a test period, the fleet of red inflammation trucks made 153,348 runs and had 20 accidents, while the fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At ? = .01, did the yellow fire trucks have a pregnantly lower accident identify? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) rein the sample proportions and z test statistic. (d) Make a decision. (e) hazard the p-economic value and interpret it. (f) If statistically significant, do you think the battle is life-sized enough to be important? If so, to whom, and why? (g) Is the normality arrogance fulfilled? Explain. (Pages 397-399)
a) State the Hypothesis: (Pages 347-348)
a. H0: There is no significant difference in the accident rate of red fire trucks compared to yellow fire trucks.
b. H1: There is a significant difference in the accident rate of red fire trucks compared to yellow fire trucks.
b) State the decision rule and sketch it: (Pages 350-353) You moldiness reject the null hypothesis if the test statistic of the calculated value is less than the critical value of z.
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c) Find the sample proportions and z test statistic: (Pages 351; 357-359)
|Hypothesis test for two independent proportions | |
| | | | | |
| |p1 |p2 |pc | |
| |0.0001 |0.00003 |8.33878E-05 | p (as decimal) |
| |0.0001 |0.00003 |8.33878E-05 | p (as fraction) |
| |19.997 |4.05105 |24.0476292 | X |
| |153348 |135035...If you want to get a full essay, order it on our website: Orderessay
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