In a large population, 67% of the households have cable tv. A simple random sample of 256 households is to be contacted and the
sample proportion computed. What is the mean and standard deviation of the sampling distribution of the sample proportions?
1 answer:
Answer: 
Step-by-step explanation:
The mean and standard deviation of the sampling distribution of the sample proportions is given by :-

, where n is the sample size and p is the population proportion.
Given : p= 0.67 and n= 256
Then, the mean and standard deviation of the sampling distribution of the sample proportions is given by :-

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