# FournierErika_N6208_Assignment 6B.docx - N6208 Assignment...

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N6208 Assignment Chapter 6: t-tests 1 The following are data for subcutaneous oxygen tension (PSCO2, measured in mm Hg) 12 hours after the start of two protocols, administered to the same 10 healthy subjects in random order--a bed rest protocol and a high activity protocol: Subject Bed Rest High Activity 1 67 63 2 68 62 3 70 69 4 66 64 5 68 67 6 62 60 7 71 66 8 65 65 9 67 63 10 65 62 Compute the t statistic for dependent groups and the df for these data. Using α = .05 for a two-tailed test, is this t statistically significant? Attach SPSS printout. Answer: According to the table, the value is 2.26. The computed value is 4.182. According to your Powerpoint, if the computed value is GREATER than the table value, then t is statistically significant. In this example 4.182 is greater than 2.26 and this means that t is statistically significant. 2 Suppose we wanted to test the hypothesis that the employment status of these disadvantaged women (i.e., whether they were working or not working at the time of the interview) was related to their level of depression. (a) Formally state the null and alternative hypothesis for this situation.