I need help  A researcher finds the mean of X is 69.73, the mean of Y is 65.07, sx is 15.78, sy is 14.54, and r = .902. The t for dependent samples is 2.65 with 14 degrees of freedom, so the statistical conclusion is to reject H0. Suppose that these data were from two samples drawn independently (rather than them being dependent). (a) Calculate t for two independent means (as in Chapter 15). (b) Is the obtained t smaller or larger than the t for dependent samples? Why? (c) In general, if r = 0 what effect would it have for the dependent-samples t test?

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