A question of medical interest is whether jogging leads to a reduction in systolic blood pressure. To learn about this question, eight non-jogging volunteers have agreed to begin a 1-month jogging program. At the end of the month, their blood pressures were determined and compared with earlier values. The data are presented in the Table 1.   a. The appropriate hypotheses are: H0 :μ1−μ2 =0 versus Ha :μ1−μ2 /=

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A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, can affect mental alertness.  A sample of n = 9 college students is obtained and each student’s performance on a familiar video game is measured before and after eating a traditional Thanksgiving dinner including roast turkey.  The average score dropped by M = 14 points after the meal with SS = 1152 for the difference scores. A. Is there is significant difference in performance before eating versus after eating?  Use a                two-tailed test with α = .05.             SMD = ___________________________             tcritical =     ________________________             tcalculated =    ________________________                  Decision = _______________________             B. Compute r2 to measure the size of the effect.             r2  = _____________________________   C. Write a sentence demonstrating how the outcome of the test and the measure of effect                size would…

A researcher reports an F-ratio with df = 3, 36 from an independent-measures research study. Based on the df values, how many treatments were compared in the study and what was the total number of subjects participating in the study? O 4 treatments and 40 subjects O 2treatments and 35 subjects O 3 treatments and 37 subjects O 4 treatments and 36 subjects