DrJohnson Is Studying the Effects of Aspirin on Heart Rate

question 83

Multiple Choice

Dr.Johnson is studying the effects of aspirin on heart rate.He believes that aspirin will lower heart rate.He has 2 groups the treatment group receives 80mg of aspirin for a week (n=4) the control group received a placebo (n=4) and their heart rates are compared.Below is his data in which heart rate is beats per minute.He sets his alpha level at 0.05 and uses a directional test.
What is the 95% confidence intervals for Dr.Johnson's study?

• A)5.78 to 15.72
• B)5.99 to 15.52
• C)6.78 to 17.78
• D)None of these

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