Exam 1: Introduction: Statistics--Who Needs Them

A research team is examining the effects of stress on emotion regulation. They are particular interested in adolescents in high school, as puberty is a time that where emotions can vacillate quickly. In this case, what is the population?

A sample is drawn out of the population

Experimentation is generally done with samples instead of populations. This is because the sample data can be used to make predictions and estimates about the population

If a researcher's target population is 7^th grade students, they can still draw their sample out of 8^th grade to make generalizations about the population

Chance errors occur because of experimenter error

Which of the following most likely requires the use of inferential statistics?

Which of the following is not a good description statistics?

Jennifer reviewed the literature on research related to patients with anxiety disorders in clinical psychology. She designs a study assigning some patients to three different treatments and a control group with no treatment. She then measures anxiety symptoms 2 months after the treatment. How many levels are there for the independent variable?

A single measurement or observation within a dataset is called data

A research team is examining the effects of stress on emotion regulation. They are particular interested in adolescents in high school, as puberty is a time that where emotions can vacillate quickly. What is the dependent variable of this study?

In a study examining two different amounts of drug dosage on an particular outcome variable, the independent variable has two levels

The origins of word statistics were "predict numbers"

When collecting data from the population to draw a sample, you are forming a…

In experimentation researchers manipulate the ___________ and examine its effects on the _______________

The purpose of descriptive statistics characterize data and summarize the data into smaller pieces of information

What is an extraneous variable?

The most frequently occurring observation in a sample can be thought of as a…

Exposure to sunlight can affect our emotions, but to what extent? A researcher is interested in this question and exposes participants to a certain amount of sunlight individuals are exposed to for a week. Then he reduces the sunlight exposure and examines how individuals' emotions change. Identify the IV, DV< and type of design the researcher uses.

A researcher is conducting a large-scale study, focusing on the effects of an educational intervention on children's reading ability in schools. Half of the classrooms in a school district were assigned this intervention, and the other half were not. Identify the independent variable, dependent variable, and a potential extraneous variable. Explain why the results may or may not be generalizable.

Jennifer reviewed the literature on research related to patients with anxiety disorders in clinical psychology. She designs a study assigning some patients to three different treatments and a control group with no treatment. She then measures anxiety symptoms 2 months after the treatment. Jennifer conducts her study and claims that one particular treatment is helpful to patients who suffer from anxiety disorder. Which of the following assumptions is she making?