Question 1

only large samples can identify large group differences.

Accepted Answer

A) True 
 B)False  False

Question 2

When a small difference is anticipated, a smaller sample size should be used.

Accepted Answer

A) True 
 B)False  False

Question 3

Which of the two studies shows diminished returns in terms of increasing precision?

Accepted Answer

A)  By adding 20 individuals to a sample of 500 
B)  By adding 20 individuals to a sample of 1,000 
A)  By adding 20 individuals to a sample of 500 
B)  By adding 20 individuals to a sample of 1,000 B

Question 4

If a rare phenomenon is expected, one should use

Accepted Answer

A)  A small sample 
B)  A large sample 
A)  A small sample 
B)  A large sample

Question 5

When a large variation of answers is expected, the research should use the following:

Accepted Answer

A)  A large sample 
B)  A small sample 
A)  A large sample 
B)  A small sample

Question 6

How do statisticians define precision?

Accepted Answer

A)  The extent to which the same results would be obtained if another random sample were drawn from the same population 
B)  A sample which shows least sampling error 
C)  A large sample size that yields more accuracy of results 
D)  The extent to which sampling errors can be evaluated with inferential statistics 
A)  The extent to which the same results would be obtained if another random sample were drawn from the same population 
B)  A sample which shows least sampling error 
C)  A large sample size that yields more accuracy of results 
D)  The extent to which sampling errors can be evaluated with inferential statistics

Question 7

For a population with very limited variability, which of the following is true?

Accepted Answer

A)  Only a large sample size can yield precise results 
B)  A small sample size can yield precise results 
A)  Only a large sample size can yield precise results 
B)  A small sample size can yield precise results

Question 8

using a large sample corrects for sampling bias.

Accepted Answer

A) True 
 B)False

Question 9

How does a researcher increase precision?

Accepted Answer

A)  By decreasing the sample size 
B)  By using a random sampling method 
C)  By increasing the sample size 
D)  By using an unbiased sampling method 
A)  By decreasing the sample size 
B)  By using a random sampling method 
C)  By increasing the sample size 
D)  By using an unbiased sampling method

Exam 7: Sample Size

only large samples can identify large group differences.

When a small difference is anticipated, a smaller sample size should be used.

Which of the two studies shows diminished returns in terms of increasing precision?

If a rare phenomenon is expected, one should use

When a large variation of answers is expected, the research should use the following:

How do statisticians define precision?

For a population with very limited variability, which of the following is true?

using a large sample corrects for sampling bias.

How does a researcher increase precision?

The Empirical Approach to Knowledge

Types of Empirical Research

Scales of Measurement

Descriptive, Correlational, and Inferential Statistics

Introduction to Sampling

Variations on Random Sampling

Standard Error of the Mean

Frequencies, Percentages, and Proportions

Shapes of Distributions

The Mean: An Average

Mean, Median, and Mode

Range and Interquartile Range

Standard Deviation

Z-Score

Correlation

Pearson-R

Scattergram

Introduction to Hypothesis Testing

Decisions About the Null Hypothesis

Introduction to the T-Test

Independent Samples T-Test

Dependent Samples T-Test

One Sample T-Test

Reports of the Results of T-Tests

One-Way Anova

Two-Way Anova

Chi-Square Test

Limitations of Significance Testing

Effect Size

Coefficient of Determination

Multiple Correlation

Simple and Multiple Regression

Filters