Practice Problems The table below contains means and standard deviations from two separate papers published by different researchers. Researcher A argued that elderly people who are caring for an Alzheimer's spouse at home are better off than those whose spouse is institutionalized, and Researcher B reached the opposite conclusion. Did the two populations differ in age, SES social support, or health of non-Alzheimer participant? All indexes are scored such that higher scores mean more (i.e., higher SES, more social support, better health). 1) Conduct four independent t-tests to determine if the study populations differ. Interpret your results and report them in APA format. Note: for all four variables, you need to find df1; df2; dfTotal; torit; $2pooled; $2Difference; SDifference; tobt 2) Can your results explain why the researchers obtained different answers? Explain. Study A Study B N = 66 N = 143 Mean SD Mean SD Age 77.3 5.3 82.6 8.4 SES index 69.9 22.2 49.6 15.4 Social support 3.26 1.22 3.68 0.92 Health 7.20 2.35 5.11 1.89 3). A researcher calculated the percentage of time several people used their phones when eating with friends in a fast-food restaurant and in a fine dining establishment. Did the percentages differ? Interpret your outcome and report it in APA format. Note: you need to find: df,; df2; ofTotal; tcriti S2Pooled; $2Difference; SDifference; tobt Fast food Fine Dining 72% 15% 65% 6% 48% 9% 66% 20% 46%