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) 26 0.17 27 0.21 28 0.24 29 30 0.19 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: