# 20. The following data summarize the results from anindependent-measures study comparing three treat-ment conditions.M = 2M = 3M = 4n = 10n = 10n = 10T = 30T = 20T = 40s2 = 2.67s2 = 1.33s? = 2.00a. Use an ANOVA with a = .05 to determinewhether there are any significant differencesamong the three treatment means. Note: Becausethe samples are all the same size, MSaverage of the three sample variances.b. Calculate n? to measure the effect size for thisstudy.is thewithin 18. The following data were obtained from an inde-pendent-measures study comparing three treatmentconditions.TreatmentIIII38.N = 12G = 48EX = 23836.46.M = 4M = 2M = 6T = 8T = 24T = 16SS = 2SS = 8SS = 421a. Calculate the sample variance for each of the threesamples.b. Use an ANOVA with a = .05 to determinewhether there are any significant differencesamong the three treatment means.

Question
Asked Jan 18, 2020
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Step 1

a)

The null and alternative hypotheses are shown below:

Step 2

The level of the significance is 0.05.

The critical region is obtained as shown below:

Step 3

Critical value for (2, 27) with the level of significance 0.05 ...

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