If It Is Known That the Population Proportion of Car

question 28

Short Answer

If it is known that the population proportion of car parks in a particular city that offer early discount fees is 25%, which of the following best describes the mean and standard deviation of the sampling distribution of the sample proportion of car parks that offer early discount fees for samples taken of size 30? $\begin{array}{|l|l|}\hline A&\text { The mean is 0.25 and the standard deviation is 0.006 .}\\\hline B&\text {The mean is 0.25 and the standard deviation is 0.75 . }\\\hline C&\text {The mean is 0.25 and the standard deviation is 0.079 . }\\\hline D&\text {None of these choices are correct. }\\\hline \end{array}$

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