PSY230 Exam 1 Review

In which class interval does P60 fall?

A histogram is used to represent frequency distributions of data measured on the ___ scale(s) of measurement.

When designing an experiment you would use __ to select people from a population of interest to participate in the study

The field of astrology is considered a:

Which of the following types of research can be used to determine causality?

In a negatively skewed distribution, the mean is greater than the mode

An independent variable (IV) is what we are

If the two sides of a curve folded in half coincide (e.g., they overlap each other perfectly), the curve is said to be

Which of the following measures of variability refers to the average squared distance from the mean?

In a normal distribution, the mean, median, and mode are the same

X-bar indicates a __, and mu indicates a__

Which of the following is true about the sum of squares?

In the accompanying figure, a, b, and c denote measures of central tendency in what order?

The field of Philosophy is considered a:

______________ statistics involve techniques that allow conclusions to be drawn about populations.

When researchers manipulate an independent variable (IV) in an experimental study, the IV will be on which type of scale

I want to estimate how many NAU students eat at QDOBA. All NAU students would constitute a:

How are you feeling about the exam? (No right answer!)

Which of the following z scores is most distant from the mean?

The dependent variabe is what we are

One is able to conclude causation from experimental studies

This type of sampling is intended to create a representative sample.

Inferential statistics uses sample data to generalize to a larger population of interest

Which column indicates the proportion of the total number of scores that occur in each interval?

The standard deviation tells us:

Five percent of the z distribution can be found above a z score of 1.645. What pecercent is found below -1.645?

All of the following are measures of variability EXCEPT the:

The accompanying equation is used to calculate the _______.

Range tells us:

This table is an example of a:

What percent of scores fall at or below the score of 79.5?

How are you feeling about the exam right now? (No right answer!)

The average (mean) of some sample raw scores is considered a

Which one of the following is true of the sum of the deviation scores about the mean when trying to measure variability?

A scale of Depressive symptoms with 20 questions measured on a rating scale from 1 to 5 would be an example of a:

The ___________ is the percentage of scores with values lower than the score in question.

Which of the following is an example of a continuous variable?

The mean, median, mode, range, and standard deviation of a sample are all examples of _____________ statistics.

What are the two main reasons why random sampling should be used when possible according to the text?

Which of the following is a measure of variability?

Approximately what percentage of a normal z-score distribution is between two standard deviations of the mean?

A number calculated on population data that quantifies a characteristic of the population is called a __.

You plan on representing the number of students enrolled in five different clubs on campus. You would use a:

For an experiment, you would use __ to place participants into groups based on specific levels of the IV.

Which one of the following is true about z scores and the z distribution?