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.

a. What is the nondirectional alternative hypothesis?

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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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