Question 1

Distinguish between an experimental strategy and an observational strategy.

Accepted Answer

The answer of Distinguish between an experimental strategy and an...

Question 2

Dr.Chin is studying the effect of lysine on memory.He gives one group lysine and the other subjects a placebo.He is using a____________________.

Accepted Answer

The answer of Dr.Chin is studying the effect of lysine...

Question 3

What is a disturbance variable and how can they be controlled?

Accepted Answer

The answer of What is a disturbance variable and how...

Question 4

What is a confounding variable and how can they be controlled?

Accepted Answer

The answer of What is a confounding variable and how...

Question 5

The ____________________is a computer simulation which allows statisticians to determine if a data set violates an assumption.

Accepted Answer

The answer of The ____________________is a computer simulation which allows...

Question 6

In a within-subjects design the treatment and placebo conditions need to be ____________________to control for order effects.

Accepted Answer

The answer of In a within-subjects design the treatment and...

Question 7

Robustness refers to the extent to which conclusions drawn on the basis of a statistical test (for example,rejection of the null hypothesis)are unaffected by violations of the assumptions underlying the test.

Accepted Answer

Robustness is indeed defined as the ability of a statistical test to produce reliable and valid results even when its assumptions are not strictly met. Therefore, conclusions drawn based on a robust test should remain unaffected by minor or moderate deviations from the assumptions.

Question 8

A ____________________is unrelated to the independent variable but affects the dependent variable.

Accepted Answer

The answer of A ____________________is unrelated to the independent variable...

Question 9

The within-subjects design can offer considerably more experimental control than the between-subjects design.

Accepted Answer

Within-subjects designs involve each participant being exposed to all levels of the independent variable, allowing for greater control over individual differences and increased statistical power. In contrast, between-subjects designs involve different groups of participants being exposed to different levels of the independent variable, which can lead to greater variability and potential for extraneous variables influencing the results.

Question 10

Describe how random assignment helps to control for alternative explanations.

Accepted Answer

The answer of Describe how random assignment helps to control...

Question 11

A ____________________is a variable that is related to the independent variable and may affect the dependent variable if it is not controlled for.

Accepted Answer

The answer of A ____________________is a variable that is related...

Question 12

A Monte Carlo study is a computer simulation study in which the statistician uses the computer to generate scores for hypothetical populations that he or she knows violates a distributional assumption in some way.

Accepted Answer

This is a correct definition of a Monte Carlo study, where the statistician simulates random data sets to test statistical methods or models under different assumptions.

Question 13

The ____________________variable is measured by the researcher.

Accepted Answer

The answer of The ____________________variable is measured by the researcher....

Question 14

Nonparametric statistics require quantitative dependent variables and are usually applied when these variables are measured on a level that at least approximates interval characteristics.

Accepted Answer

Nonparametric statistics are typically used when data do not meet the assumptions of parametric tests, often involving ordinal or nominal data, not necessarily requiring interval-level measurement.

Question 15

The normality and homogeneity of variance assumptions relate only to samples,not to the populations from which the samples were drawn.

Accepted Answer

The assumptions of normality and homogeneity of variance apply to the populations from which the samples are drawn, not just the samples themselves. These assumptions are important for certain statistical tests to be valid.

Question 16

Once subjects have been selected they should be ____________________to groups.

Accepted Answer

The answer of Once subjects have been selected they should...

Question 17

If you are measure how satisfied they are with their marriage you may want to ____________________couples on the amount of time they've been married.

Accepted Answer

The answer of If you are measure how satisfied they...

Question 18

Another term used for within-subjects design is ____________________.

Accepted Answer

The answer of Another term used for within-subjects design is...

Question 19

One potential problem with between-subjects designs is the fact that the treatment in the first condition may have carry-over effects that influence performance in the second condition.

Accepted Answer

In a between-subjects design, different participants are used for each condition, so there is no carry-over effect from one condition to another. Carry-over effects are a concern in within-subjects designs.

Question 20

The ____________________variable is manipulated by the researcher.

Accepted Answer

The answer of The ____________________variable is manipulated by the researcher....

Quiz 9: Principles of Research Design and Statistical Preliminaries for Analyzing Bivariate Relationships