Question 1

In what units are Z scores calculated?

Accepted Answer

A)  In units of standard deviation 
B)  In units of standard error 
C)  In units of range 
D)  In units of the mean 
A)  In units of standard deviation 
B)  In units of standard error 
C)  In units of range 
D)  In units of the mean A

Question 2

Suppose a sample has a mean of 15 and standard deviation of 5. What is the Z score of a score of 20?

Accepted Answer

Z score = 1 (Z score = [20-15)/5]

Question 3

On the normal distribution, the Z score of 1 marks 84.13% under the curve. Which of the statement is NOT true?

Accepted Answer

A)  84.13% of the data are under the Z score of 1 
B)  15.87% of the data are above the Z score of 1 
C)  The Z score of 1 shows the 84.13 percentile score 
D)  The Z score of 1 shows the 15.87 percentile score 
A)  84.13% of the data are under the Z score of 1 
B)  15.87% of the data are above the Z score of 1 
C)  The Z score of 1 shows the 84.13 percentile score 
D)  The Z score of 1 shows the 15.87 percentile score D

Question 4

What does a Z score of 1 mean?

Accepted Answer

A)  The score is 1 point above the mean 
B)  The score is 1 standard deviation above the mean 
C)  The score is 1 standard deviation below the mean 
D)  The score is 1 
A)  The score is 1 point above the mean 
B)  The score is 1 standard deviation above the mean 
C)  The score is 1 standard deviation below the mean 
D)  The score is 1

Question 5

What percent of the data are below the Z score of 0?

Accepted Answer

A)  0% 
B)  10% 
C)  50% 
D)  100% 
A)  0% 
B)  10% 
C)  50% 
D)  100%

In what units are Z scores calculated?

Suppose a sample has a mean of 15 and standard deviation of 5. What is the Z score of a score of 20?

On the normal distribution, the Z score of 1 marks 84.13% under the curve. Which of the statement is NOT true?

What does a Z score of 1 mean?

What percent of the data are below the Z score of 0?

The Empirical Approach to Knowledge

Types of Empirical Research

Scales of Measurement

Descriptive, Correlational, and Inferential Statistics

Introduction to Sampling

Variations on Random Sampling

Sample Size

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

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

Exam 15: Z-Score

In what units are Z scores calculated?

Suppose a sample has a mean of 15 and standard deviation of 5. What is the Z score of a score of 20?

On the normal distribution, the Z score of 1 marks 84.13% under the curve. Which of the statement is NOT true?

What does a Z score of 1 mean?

What percent of the data are below the Z score of 0?

The Empirical Approach to Knowledge

Types of Empirical Research

Scales of Measurement

Descriptive, Correlational, and Inferential Statistics

Introduction to Sampling

Variations on Random Sampling

Sample Size

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

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