# Question

Assume that in a sociology class, the teacher gives a midterm exam and a final exam. Assume that the association between midterm and final scores is linear. Here are the summary statistics:

Midterm: Mean = 72, Standard deviation = 8

Final: Mean = 72, Standard deviation = 8

Also, r = 0.75 and n = 28.

a. Find and report the equation of the regression line to predict the final exam score from the midterm score.

b. For a student who gets 55 on the midterm, predict the final exam score.

c. Your answer to part b should be higher than 55. Why?

d. Consider a student who gets a 100 on the midterm. Without doing any calculations, state whether the predicted score on the final exam would be higher, lower, or the same as 100.

Midterm: Mean = 72, Standard deviation = 8

Final: Mean = 72, Standard deviation = 8

Also, r = 0.75 and n = 28.

a. Find and report the equation of the regression line to predict the final exam score from the midterm score.

b. For a student who gets 55 on the midterm, predict the final exam score.

c. Your answer to part b should be higher than 55. Why?

d. Consider a student who gets a 100 on the midterm. Without doing any calculations, state whether the predicted score on the final exam would be higher, lower, or the same as 100.

## Answer to relevant Questions

The table shows the heights and weights of some people. The scatterplot shows that the association is linear enough to proceed. Height (inches) Weight (pounds) 60 .............. 105 66 .............. 140 72 ...The scatterplot shows the age in years and the number of hours of sleep for some college men (M) and women (F). a. How do we interpret the fact that both lines have a negative slope? b. How do we interpret the fact that the ...The table gives the number of miles per gallon in the city and on the highway for the coupes and compact cars reported to have the best gasoline mileage, according to autobytel.com. Make a scatterplot, using the city mileage ...The figure shows a scatterplot of the educational level of twins. Describe the scatterplot. Explain the trend and mention any unusual points. (Source: www.stat.ucla.edu) A soda-bottling plant has a flaw in that 20% of the bottles it fills do not have enough soda in them. The sodas are sold in six-packs. Follow these steps to carry out a simulation to find the probability that three or more ...Post your question

0