It has been estimated that only about 35% of California residents have adequate earthquake supplies. A random sample of 120 California residents are surveyed.

1. Explain why the sampling distribution of sample proportions is approximately normal. Show the calculation to earn full credit.
2. Compute the mean p^p^ and standard error p^p^ . Show the calculations and round the standard error to three decimal places to earn full credit.
3. 50 of the California residents from the sample said that they have adequate earthquake supplies. Compute the sample proportion p^p^. Is the sample proportion unusual? Show the calculation and round to three decimal places to earn full credit.