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QUESTION 15 A researcher conducts an independent-measures research study and obtains t = 2.070 with df = 28. How many individuals participated in the entire research study? O 30 O 29 O 28 QUESTION 16 A researcher conducts an independent-measures research study and obtains t = 2.070 with df = 28. Using a one-tailed test with alpha = .05, which of the following is the appropriate critical value? O 1.697 O 1.701 O 2.048 O2.042 QUESTION 17 For an independent-measures research study, the data show a 8 points difference between the two treatment means and a pooled variance of 6. Given this information, the value of Cohen's dis which of the following? O 1.33 O 0.31 O 0.75 2.45 QUESTION 18 One sample has n = 4 scores with SS = 100 and a second sample has n = 8 with SS = 140. What is the estimated standard error for the sample mean difference? O 1.90 O 2.74 O 3.00 O 4.86 1 points 1 points 1 points 1 points Save Answer Save Answer Save Answer Save Answer