State police believe that 30% of the drivers traveling on a major interstate hig

Question

State police believe that 30% of the drivers traveling on a major interstate highway exceed the speed limit. They plan to set up a radar trap and check the speeds the first 70 cars which the trap. Answer following a) Using the 68-95-99 7 rule, draw and label the distribution of the proportion of these cars the police will observe speeding. Which graph shows the distribution of the proportion with the intervals 68%, 95%, and 99 7%? A. B. C. D. b) Do you think the appropriate conditions necessary for your analysis are met? Are the conditions necessary to use a normal model met? A. Yes, all the conditions are met. B. No the success/failure condition is not met. C. No the 10% and success/failure conditions are not met. D. No, the randomization and 10% conditions are not met. E. No the randomization and success/failure conditions are not met. F. No the randomization condition is not met. G. No, the 10% condition is not met. H. No none of the conditions are met.

Explanation / Answer

here p=0.3

and n=70

hence std error =(p(1-p)/n)1/2 =0.055

option B is correct

for above randomization is not being done

hence option F is correct

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