In an unpaired two-sample problem an experimenter observes
Chapter 9, Problem 9.3.5(choose chapter or problem)
In an unpaired two-sample problem an experimenter observes n =13, x =0.0548, sx =0.00128 from population A and m =15, y =0.0569, sy =0.00096 from population B. (a) Construct a 95% one-sided condence interval A B (,c) using the pooled variance method. (b) Consider a one-sided hypothesis test of H0 : A B versus HA : A < B using the pooled variance method. Does a size =0.05 test accept or reject the null hypothesis? What about a size =0.01 test? Write down an expression for the exact p-value.
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