9th grade 10th grade 11th grade 12th grade 6 9 6 7 7 10 12 11 11 14 17 8 11 14 15 15 16 12 12 12 9. Calculate the F statistic 10. Using the table in the back of the book, find the critical value for F (Fcrit) with α = .05 11. Calculate the Tukey HSD (using α = .05)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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A high school principal wanted to know if there was a difference in absences for 9th grade, 10th grade, 11th grade, or 12th grade among students with less than a 2.0 GPA.  She took a random sample of n = 5 students from each grade and compared absences among the four grades using ANOVA.  The data are below:

9th grade 10th grade 11th grade 12th grade

6

9

6

7

7

10

12

11

11

14

17

8

11

14

15

15

16

12

12

12

9. Calculate the F statistic

10. Using the table in the back of the book, find the critical value for F (Fcrit) with α = .05

11. Calculate the Tukey HSD (using α = .05)

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