1. Identify the null and alternative hypotheses. Choose the correct answer below. _______(FAIL TO REJECT/REJECT) evidence to ________(SUPPORT/REJECT) the claim. ANSWERS: _______(IS / IS NOT) enough 2. What are the null and alternative hypotheses? Choose the correct answer below. ANSWERS: 3. One study, based on responses from 1,019 randomly selected teenagers, concluded that 43% of teenagers cite grades as their greatest source of pressure. Use a 0.05 significance level to test the claim that fewer than half of all teenagers in the population feel that grades are their greatest source of pressure. Formulate the null and alternative hypotheses. Choose the correct answer below. ANSWERS: 4. The accompanying data are the length (in centimeters) and girths (in centimeters) of 12 harbor seals. Find the equation of the regression line. Then construct a scatter plot of the data and draw the regression line. Then use the regression equation to predict the value of y for each of the given x-values, if meaningful. If the x-value is not meaningful to predict the value of y, explain why not. Construct a scatter plot of the data and draw the regression line. Plot length on the horizontal axis and girth on the vertical axis. Choose the correct graph below. (#4 CONTINUED ON NEXT PAGE) ANSWERS: 5. Use the value of the linear correlation coefficient to calculate the coefficient of determination. What does this tell you about the explained variation of the data about the regression line? About the unexplained variation? ANSWERS: (#6 ON NEXT PAGE) 6