Question 1

We can use the standard normal curve as our model for

Accepted Answer

A) perfectly normal distributions only. 
B) perfectly normal distributions only, when transformed to z-scores. 
C) any approximately normal distribution, when transformed to z-scores. 
D) any approximately normal distribution, when transformed to percentiles. 
A) perfectly normal distributions only. 
B) perfectly normal distributions only, when transformed to z-scores. 
C) any approximately normal distribution, when transformed to z-scores. 
D) any approximately normal distribution, when transformed to percentiles. C

Question 2

What is the area above a z­score of -0.48?

Accepted Answer

0.6844

Question 3

For the following set of scores, what is the z-score for a raw score of 23?

Accepted Answer

0.50

Question 4

The distribution of z-scores is always

Accepted Answer

A) positively skewed. 
B) negatively skewed. 
C) the same shape as the distribution of raw scores. 
D) more spread out than the distribution of raw scores. 
A) positively skewed. 
B) negatively skewed. 
C) the same shape as the distribution of raw scores. 
D) more spread out than the distribution of raw scores.

Question 5

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the raw score for z­score of -1.2.

Accepted Answer

The answer of For a distribution with $\bar{X}$ = 50...

Question 6

The mean of the sampling distribution of means is always

Accepted Answer

A) greater than the population mean. 
B) less than the population mean. 
C) equal to the population mean. 
D) the population mean divided by the square root of N. 
A) greater than the population mean. 
B) less than the population mean. 
C) equal to the population mean. 
D) the population mean divided by the square root of N.

Question 7

Your relative standing informs you

Accepted Answer

A) of how your scores compares with the sample or population from which it is derived. 
B) of the significance of your score. 
C) whether your score is from a sample or a population. 
D) of surprisingly very little. 
A) of how your scores compares with the sample or population from which it is derived. 
B) of the significance of your score. 
C) whether your score is from a sample or a population. 
D) of surprisingly very little.

Question 8

If your sense of direction, relative to a sample of college students, gave you a z-score of +1.5, what is your percentile?

Accepted Answer

The answer of If your sense of direction, relative to...

Question 9

Sally's z-score on a given measure is -2.5, where the population mean is 5 and the standard deviation is 1.5.What is Sally's raw score?

Accepted Answer

A) 1.25 
B) 14 
C) 3.5 
D) 8.75 
A) 1.25 
B) 14 
C) 3.5 
D) 8.75

Question 10

You should first transform X to z in all of the following cases except if you seek

Accepted Answer

A) X that marks a given relative frequency beyond X in tail. 
B) percentile of an X above the mean. 
C) percentile of an X below the mean. 
D) relative frequency of scores beyond X in tail. 
A) X that marks a given relative frequency beyond X in tail. 
B) percentile of an X above the mean. 
C) percentile of an X below the mean. 
D) relative frequency of scores beyond X in tail.

Question 11

To evaluate a person for possible brain damage, a neuropsychologist gives the person a visual memory test and a reading test.To compare the person's performance across these two tests, what should the neuropsychologist do?

Accepted Answer

A) Graph the raw score distribution for each test on the same graph. 
B) Calculate a z-score for each test. 
C) Calculate z-scores for the sample means. 
D) Find the simple frequency of the person's raw score for each test. 
A) Graph the raw score distribution for each test on the same graph. 
B) Calculate a z-score for each test. 
C) Calculate z-scores for the sample means. 
D) Find the simple frequency of the person's raw score for each test.

Question 12

A z­score communicates a raw score's

Accepted Answer

A) absolute magnitude. 
B) distance from the mean in standard deviations. 
C) direction from the standard deviation. 
D) variability. 
A) absolute magnitude. 
B) distance from the mean in standard deviations. 
C) direction from the standard deviation. 
D) variability.

Question 13

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the z-score for a raw score of 65.

Accepted Answer

The answer of For a distribution with $\bar{X}$ = 50...

Question 14

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the raw score for z-score of +2.6.

Accepted Answer

The answer of For a distribution with $\bar{X}$ = 50...

Question 15

The sample mean for a recent introductory psychology test was 78, and the sample variance was 9.If a student
received a score of 82, what was this student's z-score?

Accepted Answer

The answer of The sample mean for a recent introductory...

Question 16

When two normal z-distributions are plotted on the same graph, what can we say about the relative frequency of each z-score?

Accepted Answer

A) It will always be the same. 
B) It will always be different. 
C) It depends on the raw score mean. 
D) It depends on the raw score standard deviation. 
A) It will always be the same. 
B) It will always be different. 
C) It depends on the raw score mean. 
D) It depends on the raw score standard deviation.

Question 17

Suppose the population mean of some measure is 6 and the population standard deviation is 12.For a sample of 36, what is the standard error of the mean?

Accepted Answer

A) 2 
B) 1 
C) 1/6 
D) 1/2 
A) 2 
B) 1 
C) 1/6 
D) 1/2

Question 18

The sample mean for a recent introductory psychology test was 78, and the sample variance was 9.If a student's z- score = -2.0, what was this student's raw test score?

Accepted Answer

The answer of The sample mean for a recent introductory...

Question 19

z-scores can be calculated from

Accepted Answer

A) any data. 
B) interval or ratio scores. 
C) nominal or ordinal scores. 
D) the range. 
A) any data. 
B) interval or ratio scores. 
C) nominal or ordinal scores. 
D) the range.

Question 20

What raw score is at the 34th percentile 34.13 to be exact) when the mean of the distribution is 50 and the standard deviation is 4?

Accepted Answer

The answer of What raw score is at the 34th...

We can use the standard normal curve as our model for

What is the area above a zscore of -0.48?

For the following set of scores, what is the z-score for a raw score of 23?

The distribution of z-scores is always

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the raw score for zscore of -1.2.

The mean of the sampling distribution of means is always

Your relative standing informs you

If your sense of direction, relative to a sample of college students, gave you a z-score of +1.5, what is your percentile?

Sally's z-score on a given measure is -2.5, where the population mean is 5 and the standard deviation is 1.5.What is Sally's raw score?

You should first transform X to z in all of the following cases except if you seek

To evaluate a person for possible brain damage, a neuropsychologist gives the person a visual memory test and a reading test.To compare the person's performance across these two tests, what should the neuropsychologist do?

A zscore communicates a raw score's

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the z-score for a raw score of 65.

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the raw score for z-score of +2.6.

The sample mean for a recent introductory psychology test was 78, and the sample variance was 9.If a student received a score of 82, what was this student's z-score?

When two normal z-distributions are plotted on the same graph, what can we say about the relative frequency of each z-score?

Suppose the population mean of some measure is 6 and the population standard deviation is 12.For a sample of 36, what is the standard error of the mean?

The sample mean for a recent introductory psychology test was 78, and the sample variance was 9.If a student's z- score = -2.0, what was this student's raw test score?

z-scores can be calculated from

What raw score is at the 34th percentile 34.13 to be exact) when the mean of the distribution is 50 and the standard deviation is 4?

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Central Tendency

Summarizing Scores With Measures of Variability

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters

Exam 5: Describing Data With Z-Scores and the Normal Curve

We can use the standard normal curve as our model for

What is the area above a z­score of -0.48?

For the following set of scores, what is the z-score for a raw score of 23?

The distribution of z-scores is always

For a distribution with Xˉ\bar{X}Xˉ = 50 and SXS_{X}SX​ = 5, find the raw score for z­score of -1.2.

The mean of the sampling distribution of means is always

Your relative standing informs you

If your sense of direction, relative to a sample of college students, gave you a z-score of +1.5, what is your percentile?

Sally's z-score on a given measure is -2.5, where the population mean is 5 and the standard deviation is 1.5.What is Sally's raw score?

You should first transform X to z in all of the following cases except if you seek

To evaluate a person for possible brain damage, a neuropsychologist gives the person a visual memory test and a reading test.To compare the person's performance across these two tests, what should the neuropsychologist do?

A z­score communicates a raw score's

For a distribution with Xˉ\bar{X}Xˉ = 50 and SXS_{X}SX​ = 5, find the z-score for a raw score of 65.

For a distribution with Xˉ\bar{X}Xˉ = 50 and SXS_{X}SX​ = 5, find the raw score for z-score of +2.6.

The sample mean for a recent introductory psychology test was 78, and the sample variance was 9.If a student received a score of 82, what was this student's z-score?

When two normal z-distributions are plotted on the same graph, what can we say about the relative frequency of each z-score?

Suppose the population mean of some measure is 6 and the population standard deviation is 12.For a sample of 36, what is the standard error of the mean?

The sample mean for a recent introductory psychology test was 78, and the sample variance was 9.If a student's z- score = -2.0, what was this student's raw test score?

z-scores can be calculated from

What raw score is at the 34th percentile 34.13 to be exact) when the mean of the distribution is 50 and the standard deviation is 4?

Introduction to Statistics and Research

Creating and Using Frequency Distributions

Summarizing Scores With Measures of Central Tendency

Summarizing Scores With Measures of Variability

Using Probability to Make Decisions About Data

Overview of Statistical Hypothesis Testing: the Z-Test

Hypothesis Testing Using the One-Sample T-Test

Hypothesis Testing Using the Two-Sample T-Test

Describing Relationships Using Correlation and Regression

Hypothesis Testing Using the One-Way Analysis of Variance

Understanding the Two-Way Analysis of Variance

Chi Square and Nonparametric Procedures

Filters

What is the area above a zscore of -0.48?

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the raw score for zscore of -1.2.

A zscore communicates a raw score's

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the z-score for a raw score of 65.

For a distribution with $\bar{X}$ = 50 and $S_{X}$ = 5, find the raw score for z-score of +2.6.