. Question 3 A sample of size 20 was gathered from high school seniors to estimate how many intended to attend the state university. It is known that the proportion of the population answering "yes" was 0.9. What are the mean and standard deviation, and standard error of the mean of this sample? mean = E(p) = standard error = SD(p ) (accurate to 3 decimal places) =. Question 4 250 (Round to 4 decimals.)' Question 5 1'