# Note t 157 if d before after e using a 5 significance

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NOTE: t = -1.57 if d = before - after e) Using a 5% significance level, what is the critical value for this test? What is the P -value? What is your decision for this test? (4 points) f) Using your test statistic and critical value (or P -value), state the conclusion from your hypothesis test in relation to the original question. (4 points) g) Which type of statistical error do you risk committing based on the decision given in part e)? What does this potential error mean in the context of the problem? (5 points)
Problem 2 (40 points). Fast food is often considered unhealthy because much of it is high in both fat and calories. Can fat content be used to predict calories? To try to answer this question, seven fast- food hamburgers were analyzed for fat content and calories. A plot of the data, Excel regression output, and a residual plot are shown below. In addition, 34.286 and SS 365.429 xx x . a) Based on the information provided above, list two things that make you think that using simple linear regression as a model might be a reasonable approach. (2 points)
b) Write down the equation for the regression line. (3 points)
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