# Suppose we wanted to test the hypothesis that a

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3 Suppose we wanted to test the hypothesis that a control group of cancer patients (Group 1) would report higher mean pain ratings than an experimental group receiving special massage treatments (Group 2). Using the following information, the computed t statistic for independent groups is t=3.54 M 1 = 78.50 SD 1 2 = 42.10 n 1 =25 M 2 = 72.10 SD 2 2 = 39.70 n 2 =25 a) What are the degrees of freedom? :
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Michelle Beccio Assignment 5 N6208 b) Using α = .05 for a two-tailed test, is this t statistically significant? c) Write one or two sentences that could be used to report the results obtained for the t -test in this question. 4 For question 3, assume that the pooled SD for the two groups is 7.05. Calculate the value of d. Would you say the effective size is large, medium, or small? 5 For each of the following t values, indicate whether the t is statistically significant for a two- tailed test, at the specified alpha: a. t = 2.40, df b. t = 2.40, c. t = 5.52, df d. t = 2.02, df 6 State the critical (tabled) value of t that would be used to reject the null hypothesis of equality of population means, for an independent groups t -test under each of the following conditions: a. H1: μ1 ≠ μ2; n 1 = 20, n 2 = 20; α = .05: