Statistics

There are 8 students in line at Subway. How many different ways can the students line up in single file? 2. In a class of 25 students, how many different ways could we select a class president, treasurer and secretary? 3. The probability of the number of times that the school would offer crispitos for lunch in a given week are as follows: # of days served 0 2 3 % 1 48 31 15 Compute the mean and the standard deviation for the number of times crispitos are served in a week at school. X x (# of days (X- (X- served) P(x XP.(x) 1 4 ) 12 4 ) 12 * P ( x ) 0 - W N mean = standard deviation =