
247Data Analysis and Statistical Testing
Step d: Calculate the SSWS.
SSWS for =∑ +∑ −+∑− ++∑− =
xx xxi
iiikik11
22
33
1−µ µµ µ ,223, …
SSWS =++
+++
()()()
60 62 580625 50 52 570525
22
−−
..
+++−
=
()()
40 40 30 40 1550
22
−
Step e: Calculate the SSTV.
SSTV SSBS SSWS=+ =+=1016 68 1550 2566 68..
Step f: Calculate MSBS and MSWS, and setup an ANOVA summary as shown
in Table 6.30.
The DOF for between sample variance is 2and that for within sample vari-
ance is 9. For the corresponding DOF, we compute the F-value using the
F-distribution table and obtain the p-value as 0.103.
Step 4: Dene signicance level.
After obtaining t