Deck 1: Why Is My Evil Lecturer Forcing Me to Learn Statistics

Question 1

A café owner wanted to compare how much revenue he gained from lattes across different months of the year. What type of variable is 'month'?

A)continuous
B)categorical
C)dependent
D)interval

Answer 1

B

Question 2

A variable manipulated by a researcher is known as:

A)A discrete variable
B)An independent variable
C)A dependent variable
D)A confounding variable

Answer 2

B

Question 3

The discrepancy between the numbers used to represent something that we are trying to measure and the actual value of what we are measuring is called:

A)Reliability
B)The 'fit' of the model
C)Variance
D)Measurement error

Answer 3

D

Question 4

Variation due to variables that have not been measured is known as:

A)Homogenous variance
B)Systematic variation
C)Residual variance
D)Unsystematic variation

Question 5

If the scores on a test have a mean of 26 and a standard deviation of 4, what is the z-score for a score of 18?

A)2
B)-1.41
C)-2
D)11

Question 6

The purpose of a control condition is to:

A)Rule out a tertium quid.
B)Allow inferences about cause.
C)Control for participant characteristics.
D)Show up relationships between predictor variables.

Question 7

Which of the following is designed to compensate for practice effects?

A)Giving participants a break between tasks
B)A control condition
C)Counterbalancing
D)A repeated measured design

Question 8

A frequency distribution in which there are too few scores at the extremes of the distribution said to be:

A)Leptokurtic
B)Positively skewed
C)Platykurtic
D)Negatively skewed

Question 9

A variable that measures the effect that manipulating another variable has is known as:

A)A predictor variable
B)An independent variable
C)A dependent variable
D)A confounding variable

Question 10

Which of the following best describes a confounding variable?

A)A variable that affects the outcome being measured as well as, or instead of, the independent variable.
B)A variable that is manipulated by the experimenter.
C)A variable that has been measured using an unreliable scale.
D)A variable that is made up only of categories.

Question 11

When the results of an experiment can be applied to real-world conditions, that experiment is said to have:

A)Ecological validity
B)Factorial validity
C)Content validity
D)Criterion validity

Question 12

A frequency distribution in which low scores are most frequent (i.e. bars on the graph are highest on the left hand side) is said to be:

A)Positively skewed
B)Leptokurtic
C)Platykurtic
D)Negatively skewed

Question 13

If a test is valid, what does this mean?

A)The test will give consistent results.
B)The test has internal consistency.
C)The test measures a useful construct or variable.
D)The test measures what it claims to measure.

Question 14

What kind of variable is IQ, measured by a standard IQ test?

A)Nominal
B)Continuous
C)Categorical
D)Discrete

Question 15

When questionnaire scores predict or correspond with external measures of the same construct that the questionnaire measures it is said to have:

A)Ecological validity
B)Content validity
C)Criterion validity
D)Factorial validity

Question 16

A frequency distribution in which there are too many scores at the extremes of the distribution said to be:

A)Positively skewed
B)Leptokurtic
C)Negatively skewed
D)Platykurtic

Question 17

A predictor variable is another name for:

A)An independent variable
B)A dependent variable
C)A confounding variable
D)A discrete variable

Question 18

A frequency distribution in which high scores are most frequent (i.e. bars on the graph are highest on the right hand side) is said to be:

A)Leptokurtic
B)Platykurtic
C)Negatively skewed
D)Positively skewed

Question 19

A café owner decided to calculate how much revenue he gained from lattes each month. What type of variable would the amount of revenue gained from lattes be?

A)categorical
B)discrete
C)nominal
D)continuous

Question 20

A demand characteristic is:

A)A personality trait that makes a participant likely to find an experiment too demanding.
B)When a person responds in an experiment in a way that is consistent with their beliefs about how the experimenter would like them to behave.
C)When the experimenter's behaviour affects the results of an experiment.
D)A personality trait that affects the results of an experiment in an undesirable way.

Question 21

Complete the following sentence: A small standard deviation (relative to the value of the mean itself)

A)indicates that the mean is a poor fit of the data.
B)indicates that you should analyse your data with a non-parametric test.
C)indicates that data points are close to the mean (i.e.the mean is a good fit of the data).
D)indicates that the data points are distant from the mean.

Question 22

Complete the following sentence: A large standard deviation (relative to the value of the mean itself)

A)indicates that the data points are close to the mean.
B)indicates that the mean is a good fit of the data.
C)indicates that you should analyse your data with a parametric test.
D)indicates that the data points are distant from the mean (i.e.the mean is a poor fit of the data).

Question 23

The standard deviation is the square root of the:

A)coefficient of determination
B)sum of squares
C)range
D)variance

Question 24

What is the standard deviation?

A)A measure of the dispersion or spread of data around the mean.
B)A measure of the relationship between two variables.
C)The variance squared.
D)The degree to which scores cluster at the ends of the distribution.

Question 25

Below is a histogram of ratings of Britney Spears's CD, Britney. What can we say about the data from this histogram?

A)The data are leptokurtic.
B)The modal score is 5.
C)The data are normally distributed.
D)The median rating was 2.

Question 26

What is a scientific journal?

A)A collection of articles written by scientists that have been peer reviewed.
B)A notebook kept by scientists containing important details of all their own experimental research for future reference.
C)A collection of articles written by scientists that have not yet been reviewed by other scientists in the field.
D)A piece of scientific research that has not yet been published.