Claim-two proportion z test

Reference no: EM1315065

In Dallas, some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire 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 α = .01, did the yellow fire trucks have a significantly lower accident rate?

A. State the decision rule and sketch it

B. Find the sample proportions and z test statistic.

C. Find the p-value and interpret it.

D. If statistically significant, do you think the difference is large enough to be important?

E. Is the normality assumption fulfilled? Explain.

Reference no: EM1315065

Questions Cloud

Pareto efficiency in two person : Consider the following two good pure exchange economy: Alfred's utility function is U A (x, y) = min{x, y} and Bob's utility function is U B (x, y) = max{x, y}.

Result government increases border patrols to catch illegal : As result government increases border patrols to catch illegal shipments. U.S. Customs agents perform DNA testing on the caviar to conclude

Inflammation-a natural immune response : Explain whether the inflammation a natural immune response? Explain if it is a bad thing? Why or why not? Describe in your own words the inflammatory process.

Prepare journal entries to record the above transactions : Preparation of journal entries to record issue of shares and dividend and Prepare journal entries to record the above transactions.

Claim-two proportion z test : If statistically significant, do you think the difference is large enough to be important?

Chinese purchases of financial also real assets : Elucidate how much did Chinese purchases of financial also real assets abroad exceed foreign purchases of Chinese financial also real assests.

Diagnosing the ankylosing spondylitie : Explain how the ankylosing spondylitie is diagnosed and what are the diseases, which have symptoms that are similar to AS. Explain and list the organs which are affected by the Ankylosing Spondylitis.

Calculating expected number of interruptions per day : Calculate expected number of interruptions per day. Calculate standard deviation.

How large is the eastern component : A 180kg hoop rolls along a horizontal floor so that the hoop's center of mass has a speed of 0.130m/s. How much work must be completed on the hoop to stop it.

User Account

All Pages