According to previous studies, 16% of the U.S. population is left-handed. Not knowing this, a high school student claims that the percentage of left-handed people in the U.S. is 17%. The student is going to take a random sample of 2100 people in the U.S. to try to gather evidence to support the claim. Let p be the proportion of left-handed people in the sample. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p. X 5 ? 0.17 (b) Find the standard deviation of p. 0.009 (c) Compute an approximation for P (p 0.17), which is the probability that there will be 17% or fewer left-handed people in the sample. Round your answer to four decimal places. 0.87