# Question: Answer the questions using complete sentences a What is extrapolation and

Answer the questions, using complete sentences.

a. What is extrapolation and why is it a bad idea in regression analysis?

b. How is the coefficient of determination related to the correlation, and what does the coefficient of determination show?

c. When testing the IQ of a group of adults (aged 25 to 50), an investigator noticed that the correlation between IQ and age was negative. Does this show that IQ goes down as we get older? Why or why not? Explain.

a. What is extrapolation and why is it a bad idea in regression analysis?

b. How is the coefficient of determination related to the correlation, and what does the coefficient of determination show?

c. When testing the IQ of a group of adults (aged 25 to 50), an investigator noticed that the correlation between IQ and age was negative. Does this show that IQ goes down as we get older? Why or why not? Explain.

## Answer to relevant Questions

Some investors use a technique called the “Dogs of the Dow” to invest. They pick several stocks that are performing poorly from the Dow Jones group (which is a composite of 30 well-known stocks) and invest in these. ...The table shows the weights and prices of some turkeys at different supermarkets. a. Make a scatterplot with weight on the x-axis and cost on the y-axis. Include the regression line on your scatterplot. b. Find the numerical ...Assume that in a political science class, the teacher gives a midterm exam and a final exam. Assume that the association between midterm and final scores is linear. The summary statistics have been simplified for ...a. The figure shows hypothetical data for a group of children. By looking at the figure, state whether the correlation between height and test score is positive, negative, or near zero. b. The shape and color of the each ...To become a lawyer, you must pass the bar exam in your state, and law schools often attract students by advertising their bar-passing rate: the percentage of their graduates who pass the bar exam. What qualities make for a ...Post your question