Exam 1: An Introduction to Statistics and Research Design

A researcher was interested in the effects of gender on attitudes toward women in leadership positions.The researcher surveyed a group of individuals, 12 of whom were men and 12 of whom were women.In this example, what is the dependent variable?

Outliers compromise research, including the ability to learn interesting things about the variables.

Clayton has a history of depression.As part of his self-care, he takes a depression assessment every six months.His results tend to be very consistent, except when he is in a serious depression and his results show elevated levels of depression.The fact that Clayton's results vary with his changes in mood, mirroring his depression levels, supports the _____ of the assessment.

A community researcher wanted to explore the connection between the number of bathrooms in a house and the sale price of the house.She studied 1750 home sales in an economically diverse, medium-sized city and found that the average sale price went up by $63,000 for each full bath.What is the descriptive statistic in this study?

Why do researchers typically study samples rather than populations?

Matthew is interested in measuring whether there is a difference in time spent sleeping at night in a given week between elementary school-aged children and high school-aged students.In this study, the independent variable is MOST likely to be:

The number of aces in tennis matches is calculated for 50 elite tennis players.What type of variable is number of aces?

The CDC is testing the effectiveness of a recent campaign promoting a healthy lifestyle.What is the best operational definition for healthy lifestyle?

In a between-groups research design, a participant experiences one and only one of the levels of the independent variable.

The type of car you drive is which type of variable?

The total number of Olympic medals won by a country is an example of which type of variable?

The amount of food a person eats each week (as measured in ounces) is:

The number of times a person eats fast food each week is:

In 2010, there was an interesting lawsuit about bagels.A company claimed to have created a new way to recreate "Brooklyn style" bagels and then reported that another bagel producer stole its recipe.A researcher wonders if bagel sales might have been affected simply by the story making the national news, so she tracks total bagel sales in dollars for one year before and after the news story hits.What is the dependent variable in this study?

A researcher was interested in the effects of gender on attitudes toward women in leadership positions.The researcher surveyed a group of individuals, 12 of whom were men and 12 of whom were women.In this example, gender is the _____ variable.

A five-star rating system for movies is a(n) _____ variable.

A variable for which there is an infinite number of values between any two points on the scale is:

One reason for doing correlational research is to evaluate the relationship between two variables that are related to each other either positively or negatively.However, a correlation is vulnerable to what variable, which systematically co-varies with the variable of interest?

Mattress size, including twin, full, queen, king, and California king, is a nominal variable.

A sample is necessarily smaller than its respective population.