The College Alcohol Study interviewed an SRS of 16,947 college students about their drinking habits. Suppose that 48% of all college students "drink to get drunk" at least once in a while. That is, p = 0.48.
What are the mean (±0.01) and standard deviation (0.±0001) of the proportion "p-hat"of the sample who drink to get drunk?
mean =____ standard deviation=____.
Use the Normal approximation to find the probability (±0.0001) that "p-hat" is between 0.47 and 0.49: _____