5. Chapter 12, Problem 9 The following data summarize the results from an indepe

Question

5. Chapter 12, Problem 9 The following data summarize the results from an independent-measures study comparing three treatment conditions n=5 M=5 T=25 ss = 20 n=5 M=8 T=40 SS = 24 N = 15 M=2 T = 10 ss = 16 G=75 EX2 = 525 Calculate the sample variance for each of the three samples. (Use two decimal places.) Use an ANOVA with .05 to determine whether there are any significant differences among the three treatment means. (Use two decimal places.) Degrees of Source of Variation Between treatments Within treatments Total Sum of Squares Freedom Mean Square , (Use three decimal places.) Critical value for the F-ratio = F Distribution

Explanation / Answer

as we know that s2 =SS/(n-1)

hence

critical value for F ratio is 3.885

conclusion: reject the null. there are significant difference among the three treatments.,

I II III s2 4 5 6

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