Behavioral geneticists use twin and adoption studies to estimate the relative contributions of individual differences in genes and environment.

What are some types of molecular changes that underlie epigenetic gene regulation?

A raffle is held in a club in which 10 of the 40 members who bought raffle tickets are good friends with the club president. The club president draws two winners.

If the two winners are drawn with replacement, what is the probability that a friend of the president wins each time?

Jan is a member of a class with 20 students that meets daily. Each day for a week (Monday to Friday), a student in Jan's class is randomly selected to explain how to solve a homework problem. Once a student has been selected, he or she is not selected again that week. If Jan was not one of the four students selected earlier in the week, what is the probability that she will be picked on Friday? Explain how you found your answer.

Given the average August temperature (y) and geographic latitude (x) for 20 cities in the United States. The information given that the regression equation relating these two variables is

$$\hat{y} = 113.6 – 1.01x$$

The latitude at the equator is 0. Using the regression equation, estimate the average August temperature at the equator.

The correlation between height and weight is r = 0.40 for 12th-grade male respondents (n = 1501) in a survey done in 2003 by the U.S. Centers for Disease Control and Prevention as part of the Youth Risk Behavior Surveillance System.

Calculate $r^2$, and write a sentence that interprets this value in the context of this situation.

The regression line relating verbal SAT scores and college GPA is Average GPA = 0.539 + 0.00362 (Verbal SAT)

Estimate the average GPA for those with verbal SAT scores of 600.

Here are the summary statistics for Verbal SAT scores for a high school graduating class:

$$\scriptstyle\begin{array}{l|c|c|c|c|c|c|c|c} & n & \text { Mean } & \text { Median } & \text { SD } & \text { Min } & \text { Max } & \text { Q1 } & \text { Q3 } \\ \hline \text { Male } & 80 & 590 & 600 & 97.2 & 310 & 800 & 515 & 650 \\ \text { Female } & 82 & 602 & 625 & 102.0 & 360 & 770 & 530 & 680\end{array}$$

a) Create parallel boxplots comparing the scores of boys and girls as best you can from the information given. b) Write a brief report on these results. Be sure to discuss the shape, center, and spread of the scores.

a. What are four ways that a citizen can take part in the political system? b. Why is voting such an important right and duty in a democratic society?

What is a spurious correlation?

Which machine is used most frequently in the scientific study of sleep and dreams to track brain waves in various stages of consciousness?

What are social psychologists primarily interested in?

A research company wants to conduct an experiment to test the claim of the protein shake shown. State the objective of the experiment, suggest a population, determine the experimental and control groups, and describe a sample procedure.

What is the difference between automatic and controlled thinking?