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An experiment is conducted to e valuate the effect of smoking on heart rate. Ten subjects who smoke cigarettes are randomly selected for the experiment. Each subject serves in two conditions. In condition 1, t he subject rests for a n hour, after which heart rate is measured. Incondition 2 , t he subject rests for an hour and then smokes two cigarettes. In condition 2, heart rate is measured after the subject has inished smoking the cigarettes. The data follow.

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a. What is the nondirectional alternative hypothesis?

b. What is the null hypothesis?

c. Using  0.052 tail, what do you conclude?

d. If your conclusion in part c is to afirm H1 , what is the size of the effect?

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