The probability distribution for the number of students in Statistics classes offered at a small college is given, but one value is missing. Fill in the missing value, then answer the questions that follow. X P(X) 22 0.15 23 0. 19 24 0.22 25 26 0.17 Find the mean number of students in a Statistics class at the college: Find the standard deviation of the number of students in a Statistics class at the college