Question

+ y Draw Erase Q4. (16 points.) A municipality claims that, when presented in person, the average amount of time to process a parking citation is 7 minutes. A citizen believes that the mean time exceeds this. In order to prove his claim, the citizen randomly selected 16 cases and found that the sample time to process averaged 8 minutes with a standard deviation of 4. Conduct the appropriate test at the .01 level of significance. H vs. HA Supporting work: Should H, be rejected? (Circle one): Yes No Q5. (16 points.) A large corporation claims that 80% of its employees have been with the company at least 5 years. In order to see if this claim is accurate, a sample of 100 employees was collected. In the sample, 69 employees had been with the company at least 5 years. Conduct the appropriate test at the 10 level of significance. H: vs. H: Supporting work:

Answer 1

The Sample size n= 16.(<30, 8mall sample). x=8 o=4. u=7 Null hypothesis: Hoi Alternative Hypothesis: ta: 487 (two-tailed test) Level of significance: 2-0-01 v=n4=15. ta/2,0 = 2.947 Dest-statestic: t=x-lu olunt 8-7 = 4/515 0-9682 Itlcal <Itltab. Conclusion: Hence, we accept Ho at ool level.

5) Null hypothesis: Ho: P=0.80 Alternative Hypothesis: HA:P+0.80. (two-tailed test) Level of significance: d=0.10. 69 =0.69 p= x= 69 10o q=1-p= 0.31 Etab=1.645. Pest-statistic: (::P=0.80.Q=0.20) Z= p-p PQ n. 0.68-0.80 0.80(0-20) 100 = -2.75 Conclusion: Izkal >Izltab Hence, reject Ho at 0.10 level.