Dr. Ewell, a developmental psychologist, is planning on conducting a study that involves watching children play together to determine how sharing behavior occurs in same-sex friend pairs compared to opposite-sex friend pairs. Dr. Ewell decides to collect his data at a neighborhood park. He has his two research assistants pose as a married couple having a picnic. While having their picnic, they take detailed records of the sharing behavior of the children and note whether the pairs are same sex or opposite sex. Given his use of two research assistants, he must establish the ________ of their measures.

Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings:• Life satisfaction and experience of daily stress: r = −.57, 95% CI [−.77, −.37]• Number of friends one has and experience of daily stress: r = .09, 95% CI [−.27, .45]• Number of friends one has and life satisfaction: r = .36, 95% CI [.12, .60] Dr. Guidry has decided to examine one of her relationships with a scatterplot to double-check for a curvilinear relationship. Which relationship will be most important for her to examine?

Dr. Eckhardt, a school psychologist, wants to determine the benefit of a new anti-bullying program designed for high school students. She has permission from one school district to interview 100 high school students. She randomly selects four high schools from the district and then randomly selects 25 students from each school. She randomly assigns 50 of these students to participate in the new anti-bullying program. She gives a training session on social skills to the other 50 students. The most likely target population in Dr. Eckhardt’s study is

Calculate 34-45. Choose the simplified fraction answer.

Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings:• Life satisfaction and experience of daily stress: r = −.57, 95% CI [−.77, −.37]• Number of friends one has and experience of daily stress: r = .09, 95% CI [−.27, .45]• Number of friends one has and life satisfaction: r = .36, 95% CI [.12, .60] Considering Dr. Guidry’s study, her results could most safely be generalized to which of the following groups?

What is the primary source of revenue for the state of Texas?

Shoppers often leave reviews for products that they purchased online. Which of the following best describes the external validity of product reviews on an online shopping site?

Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Below are her findings:• Life satisfaction and experience of daily stress: r = −.57, 95% CI [−.77, −.37]• Number of friends one has and experience of daily stress: r = .09, 95% CI [−.27, .45]• Number of friends one has and life satisfaction: r = .36, 95% CI [.12, .60] Matt, Dr. Guidry’s research assistant, is discussing the findings of the study with some other students. He claims that the experience of more daily stress causes people to have lower life satisfaction. Which of the following causal criteria did Matt meet?

Which is one of the primary sources of revenue for local governments in Texas?

Professor Kramer has decided to measure how happy his students are with his teaching this semester. He is teaching two classes: Psychology and Law and Introduction to Neuroscience. He gives his students a survey. Dr. Kramer needs to avoid which of the following if he hopes to have an unbiased sample?