For which of the following is a matched pairs t-test not appropriate? a.Heights of 50 randomly selected children at age 5 and then at age 6. b.Heights of both people in pairs formed by 50 randomly selected people. c.Heights of twins for 50 randomly selected pairs of twins. d.Heights of both spouses of 50 randomly selected married couples. e.Heights of 50 randomly selected children from Metro Manila and Eastern Visayas in pairs by matching family income.

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