For the following questions (17-19), consider this research scenario: A researcher randomly assigns 50 sophomores to two groups of 25. Group 1 is given computers and educational software to take home and use, while Group 2 does not receive any educational resources. Two months later, both groups are given a standardized achievement test.   Question 18:  What are the independent variable (IV) and the dependent variable (DV)?

Studies have shown that shyness has a heritability of 0.40. What does this mean?

What are some key characteristics of working memory (short-term memory)?

Use the following to answer the questions below:Trying to determine the number of students to accept is a tricky task for universities. The Admissions staff at a small private college wants to use data from the past few years to predict the number of students enrolling in the university from those who are accepted by the university. The data are provided in the following table.Number AcceptedNumber Enrolled2,4406112,8007082,7206372,3605842,6606142,620625What is the explanatory (X) variable?

Use the statement to answer the following questions below.A Fun-Size bag of M&M’s contains 4 green, 2 red, 4 yellow, 3 orange, 6 blue, and 1 brown candies.Construct a relative frequency table of the results. Use two decimal places in your relative frequencies.

Which of the following is NOT an encoding strategy?

Use the following to answer the questions below:Match the correlation to the corresponding scatterplot.________ 0.719

Use the following to answer the questions below:Trying to determine the number of students to accept is a tricky task for universities. The Admissions staff at a small private college wants to use data from the past few years to predict the number of students enrolling in the university from those who are accepted by the university. The data are provided in the following table.Number AcceptedNumber Enrolled2,4406112,8007082,7206372,3605842,6606142,620625Find the correlation between the number of students accepted and enrolled. Use two decimal places in your answer.

Use the following to answer the questions below:A group of researchers investigated the effect of media usage (whether or not subjects watch television or use the Internet) in the bedroom on “Tiredness” during the day (measured on a 50 point scale).Suppose that the researchers found that the individuals who use media in the bedroom tended to be more tired during the day than those who do not. Would it be appropriate for the researchers to conclude that using media in the bedroom causes tiredness during the day?

Use the following to answer the questions below:A high school senior is collecting data on the colleges in which she is interested. Identify the variables as either categorical or quantitative.Tuition: in thousands of dollars