Exam 4: Some Key Ingredients for Inferential Statistics: the Normal Curve, Sample Versus Population, and Probability

Jake's Z score for running ability is .60. What is Jake's raw score (assuming M =100 and SD = 7).

(Multiple Choice)

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Question 21

What IQ score would a person need to be in the top 5% of the general population? Assume M = 100 and SD = 16.

(Multiple Choice)

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Question 22

The length of conversations between supervisors and workers in a particular manufacturing industry is normally distributed with a mean of 4.0 minutes and a standard deviation of .8 minutes. What percentage of conversations are longer than 4.4 minutes? Longer than 5 minutes? Longer than 3 minutes? Shorter than 2.5 minutes? Use the normal curve table.

(Short Answer)

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Question 23

If you were looking at a graph of a normal distribution, which of the following would best describe it?

(Multiple Choice)

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Question 24

Modern public opinion polls are completely unbiased (100% accurate)at present. (True or False)

(True/False)

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Question 25

A particular nation has a human rights score of 41, which equals a Z score of 1.3. What is the percentage of nations above this score? (Assume a normal distribution.)

(Multiple Choice)

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Question 26

A probability is a proportion. (True or False)

(True/False)

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Question 27

If you were to select a score at random from a distribution that follows a normal curve, what approximately is the probability of selecting a score between Z scores of 0 and +1?

(Multiple Choice)

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Question 28

A person received a test score that is in the top 32% and the test scores follow a normal curve. This person's Z score must be at least:

(Multiple Choice)

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Question 29

A(n)__________ refers to the scores of the particular set of people studied that are intended to represent the scores in some larger population.

(Short Answer)

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Question 30

You have an aquarium full of tropical salt-water fish and you need to know the exact salt content of the water. To test it, you take a cup and scoop some of the water out. In statistical language, the scoop of water is a:

(Multiple Choice)

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Question 31

Carrie attained a score of 650 on the verbal section of her SAT. The mean grade was a 500 with a standard deviation of 100. What percentage of test takers scored below and above Carrie?

(Multiple Choice)

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Question 32

Distributions observed in nature and research commonly approximate:

(Multiple Choice)

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Question 33

A business uses a 7-point scale about satisfaction with the services it provides to clients. The ratings are normally distributed with a mean of 4.8 and a standard deviation of .5. What percentage of clients rate their satisfaction above a 5? Above a 6? Above 4? Below 4? Use the normal curve table and include a sketch.

(Short Answer)

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Question 34

A researcher conducts extensive interviews with 40 workers at a large factory in order to examine the morale among workers in general at that factory. In this example, what is the population?

(Multiple Choice)

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Question 35

The actual values of the mean, variance, and standard deviation of a population are called:

(Multiple Choice)

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Question 36

Inferential statistics is the branch of statistics that draws conclusions about _ based on information in _.

(Short Answer)

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Question 37

In a single throw of a die, what is the probability of attaining a number of 4 or lower?

(Multiple Choice)

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Question 38

Whenever possible, researchers report the proportion of individuals approached for a study who actually participated. This is called:

(Multiple Choice)

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Question 39

In a normal distribution approximately 68% of the scores are between a Z score of -1 and a Z score of __________.

(Short Answer)

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Question 40

Showing 21 - 40 of 71

Jake's Z score for running ability is .60. What is Jake's raw score (assuming M =100 and SD = 7).

What IQ score would a person need to be in the top 5% of the general population? Assume M = 100 and SD = 16.

If you were looking at a graph of a normal distribution, which of the following would best describe it?

Modern public opinion polls are completely unbiased (100% accurate)at present. (True or False)

A particular nation has a human rights score of 41, which equals a Z score of 1.3. What is the percentage of nations above this score? (Assume a normal distribution.)

A probability is a proportion. (True or False)

If you were to select a score at random from a distribution that follows a normal curve, what approximately is the probability of selecting a score between Z scores of 0 and +1?

A person received a test score that is in the top 32% and the test scores follow a normal curve. This person's Z score must be at least:

A(n)__________ refers to the scores of the particular set of people studied that are intended to represent the scores in some larger population.

You have an aquarium full of tropical salt-water fish and you need to know the exact salt content of the water. To test it, you take a cup and scoop some of the water out. In statistical language, the scoop of water is a:

Carrie attained a score of 650 on the verbal section of her SAT. The mean grade was a 500 with a standard deviation of 100. What percentage of test takers scored below and above Carrie?

Distributions observed in nature and research commonly approximate:

A researcher conducts extensive interviews with 40 workers at a large factory in order to examine the morale among workers in general at that factory. In this example, what is the population?

The actual values of the mean, variance, and standard deviation of a population are called:

Inferential statistics is the branch of statistics that draws conclusions about _ based on information in _.

In a single throw of a die, what is the probability of attaining a number of 4 or lower?

Whenever possible, researchers report the proportion of individuals approached for a study who actually participated. This is called:

In a normal distribution approximately 68% of the scores are between a Z score of -1 and a Z score of __________.

Displaying the Order in a Group of Numbers Using Tables and Graphs

The Mean, Variance, Standard Deviation, and Z Scores

Correlation and Prediction

Introduction to Hypothesis Testing

Hypothesis Tests With Means of Samples

Making Sense of Statistical Significance: Effect Size and Statistical Power

Introduction to the T Test: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Chi-Square Tests and Strategies When Population Distributions Are Not Normal

Applying Statistical Methods in Your Own Research Project

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Exam 4: Some Key Ingredients for Inferential Statistics: the Normal Curve, Sample Versus Population, and Probability

Jake's Z score for running ability is .60. What is Jake's raw score (assuming M =100 and SD = 7).

What IQ score would a person need to be in the top 5% of the general population? Assume M = 100 and SD = 16.

If you were looking at a graph of a normal distribution, which of the following would best describe it?

Modern public opinion polls are completely unbiased (100% accurate)at present. (True or False)

A particular nation has a human rights score of 41, which equals a Z score of 1.3. What is the percentage of nations above this score? (Assume a normal distribution.)

A probability is a proportion. (True or False)

If you were to select a score at random from a distribution that follows a normal curve, what approximately is the probability of selecting a score between Z scores of 0 and +1?

A person received a test score that is in the top 32% and the test scores follow a normal curve. This person's Z score must be at least:

A(n)__________ refers to the scores of the particular set of people studied that are intended to represent the scores in some larger population.

You have an aquarium full of tropical salt-water fish and you need to know the exact salt content of the water. To test it, you take a cup and scoop some of the water out. In statistical language, the scoop of water is a:

Carrie attained a score of 650 on the verbal section of her SAT. The mean grade was a 500 with a standard deviation of 100. What percentage of test takers scored below and above Carrie?

Distributions observed in nature and research commonly approximate:

A researcher conducts extensive interviews with 40 workers at a large factory in order to examine the morale among workers in general at that factory. In this example, what is the population?

The actual values of the mean, variance, and standard deviation of a population are called:

Inferential statistics is the branch of statistics that draws conclusions about ___________ based on information in ___________.

In a single throw of a die, what is the probability of attaining a number of 4 or lower?

Whenever possible, researchers report the proportion of individuals approached for a study who actually participated. This is called:

In a normal distribution approximately 68% of the scores are between a Z score of -1 and a Z score of __________.

Displaying the Order in a Group of Numbers Using Tables and Graphs

The Mean, Variance, Standard Deviation, and Z Scores

Correlation and Prediction

Introduction to Hypothesis Testing

Hypothesis Tests With Means of Samples

Making Sense of Statistical Significance: Effect Size and Statistical Power

Introduction to the T Test: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Chi-Square Tests and Strategies When Population Distributions Are Not Normal

Applying Statistical Methods in Your Own Research Project

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Inferential statistics is the branch of statistics that draws conclusions about _ based on information in _.