STATS 7 Final: Lecture 6

The data represent the number of customers waiting for a table at 7 pm for 40 consecutive Saturdays.

9,9,8,9,4,9,11,6,

13,10,6,8,4,7,5,10,

10,11,8,3,6,7,6,10,

13,11,12,6,10,7,9,10,

9,9,8,9,4,9,11,6.

Fill this table for absolute and relative frequencies.

Version 1 MATH 133 Final Exam - April 18, 2008 II.2 (15 points) Consider the matrix M = [1 1 | 1 2 1 2 3 5 | 1 3 4 5 5 14 6 -3 71 -5 8 -6 11 -13 23 -7 9 . (a) Find the reduced echelon form of M, showing your work. (You should find that M has rank 3.)

For the following data set, approximate the sample standard deviation.