Question 1

Degrees of freedom are a statistical property of a large family of distributions, including the Student's t distribution.

Accepted Answer

A) True 
 B)False  True

Question 2

A standardized value is called a Z value or Z score.

Accepted Answer

A) True 
 B)False  True

Question 3

When a variable is measured at the nominal or ordinal-level, we don't calculate its dispersion but say dispersion is maximized when observations are evenly divided among possible values.

Accepted Answer

A) True 
 B)False  True

Question 4

As consumers of popular media, we are more likely to encounter arithmetic means than percentages or proportions.

Accepted Answer

A) True 
 B)False

Question 5

Variation in the population characteristic has a direct relationship with random sampling error: As variation goes up, random sampling error goes down.

Accepted Answer

A) True 
 B)False

Question 6

A researcher who wants to reduce the magnitude of random sampling error in her study by half should ______.

Accepted Answer

A)  double the sample size 
B)  triple the sample size 
C)  quadruple the sample size 
D)  there is nothing she can do to reduce random sampling error 
A)  double the sample size 
B)  triple the sample size 
C)  quadruple the sample size 
D)  there is nothing she can do to reduce random sampling error

Question 7

In a normal distribution, a Z score of 1.96 tells us what?

Accepted Answer

A)  the sample size 
B)  the variance 
C)  how many standard deviations from the mean a sample mean is located 
D)  we need to increase our sample size 
A)  the sample size 
B)  the variance 
C)  how many standard deviations from the mean a sample mean is located 
D)  we need to increase our sample size

Question 8

Random sampling errors are mistakes or oversights made by the researchers.

Accepted Answer

A) True 
 B)False

Question 9

A large group of people of particular interest that we desire to study and understand, such as the people in a city or persons with jobs, is called a ______.

Accepted Answer

A)  population 
B)  random sample 
C)  sample 
D)  universe 
A)  population 
B)  random sample 
C)  sample 
D)  universe

Question 10

A researcher working with a sample size of 35 should use the Student's t distribution to make inferences about the population mean.

Accepted Answer

A) True 
 B)False

Question 11

Researchers study small groups of units of analyses to learn about the characteristics of a ______.

Accepted Answer

A)  sample 
B)  population 
C)  universe 
D)  census 
A)  sample 
B)  population 
C)  universe 
D)  census

Question 12

A researcher studying the height of college freshmen determines the average height of males to be 5'10 with a standard deviation of 1.5 inches. John has a Z score of +1.96, which means John is what height?

Accepted Answer

A)  5'7 
B)  6'1 
C)  6'4 
D)  5'4 
A)  5'7 
B)  6'1 
C)  6'4 
D)  5'4

Question 13

A ______ shows how random sampling error shapes the expected values of sampling statistics.

Accepted Answer

A)  sampling distribution 
B)  standard deviation 
C)  unit of analysis 
D)  sampling frame 
A)  sampling distribution 
B)  standard deviation 
C)  unit of analysis 
D)  sampling frame

Question 14

A particular number of cases drawn from the entire group a researcher wishes to study is known as a ______.

Accepted Answer

A)  population 
B)  universe 
C)  sample 
D)  census 
A)  population 
B)  universe 
C)  sample 
D)  census

Question 15

A Z score is a method used to ______ the scores in a normal distribution.

Accepted Answer

A)  standardize 
B)  report 
C)  measure 
D)  manipulate 
A)  standardize 
B)  report 
C)  measure 
D)  manipulate

Question 16

The standard error of a statistic is a single number.

Accepted Answer

A) True 
 B)False

Question 17

The number of degrees of freedom is equal to the sample size, n, minus the number of parameters being estimated by the sample.

Accepted Answer

A) True 
 B)False

Question 18

The US Census is an example of a ______.

Accepted Answer

A)  sample 
B)  population 
C)  random sample 
D)  universe 
A)  sample 
B)  population 
C)  random sample 
D)  universe

Question 19

In a normal distribution ______ percent of all scores fall with two standard deviations of the mean.

Accepted Answer

A)  99 
B)  68 
C)  50 
D)  95 
A)  99 
B)  68 
C)  50 
D)  95

Question 20

A normally distributed set of sample means resembles a standard bell curve.

Accepted Answer

A) True 
 B)False

Degrees of freedom are a statistical property of a large family of distributions, including the Student's t distribution.

A standardized value is called a Z value or Z score.

When a variable is measured at the nominal or ordinal-level, we don't calculate its dispersion but say dispersion is maximized when observations are evenly divided among possible values.

As consumers of popular media, we are more likely to encounter arithmetic means than percentages or proportions.

Variation in the population characteristic has a direct relationship with random sampling error: As variation goes up, random sampling error goes down.

A researcher who wants to reduce the magnitude of random sampling error in her study by half should ______.

In a normal distribution, a Z score of 1.96 tells us what?

Random sampling errors are mistakes or oversights made by the researchers.

A large group of people of particular interest that we desire to study and understand, such as the people in a city or persons with jobs, is called a ______.

A researcher working with a sample size of 35 should use the Student's t distribution to make inferences about the population mean.

Researchers study small groups of units of analyses to learn about the characteristics of a ______.

A researcher studying the height of college freshmen determines the average height of males to be 5'10 with a standard deviation of 1.5 inches. John has a Z score of +1.96, which means John is what height?

A ______ shows how random sampling error shapes the expected values of sampling statistics.

A particular number of cases drawn from the entire group a researcher wishes to study is known as a ______.

A Z score is a method used to ______ the scores in a normal distribution.

The standard error of a statistic is a single number.

The number of degrees of freedom is equal to the sample size, n, minus the number of parameters being estimated by the sample.

The US Census is an example of a ______.

In a normal distribution ______ percent of all scores fall with two standard deviations of the mean.

A normally distributed set of sample means resembles a standard bell curve.

The Definition and Measurement of Concepts

Measuring and Describing Variables

Proposing Explanations, Framing Hypotheses, and Making Comparisons

Research Design, Research Ethics, and Evidence of Causation

Making Controlled Comparisons

Tests of Significance and Measures of Association

Correlation and Linear Regression

Logistic Regression

Filters

Exam 6: Foundations of Statistical Inference

Degrees of freedom are a statistical property of a large family of distributions, including the Student's t distribution.

A standardized value is called a Z value or Z score.

When a variable is measured at the nominal or ordinal-level, we don't calculate its dispersion but say dispersion is maximized when observations are evenly divided among possible values.

As consumers of popular media, we are more likely to encounter arithmetic means than percentages or proportions.

Variation in the population characteristic has a direct relationship with random sampling error: As variation goes up, random sampling error goes down.

A researcher who wants to reduce the magnitude of random sampling error in her study by half should ______.

In a normal distribution, a Z score of 1.96 tells us what?

Random sampling errors are mistakes or oversights made by the researchers.

A large group of people of particular interest that we desire to study and understand, such as the people in a city or persons with jobs, is called a ______.

A researcher working with a sample size of 35 should use the Student's t distribution to make inferences about the population mean.

Researchers study small groups of units of analyses to learn about the characteristics of a ______.

A researcher studying the height of college freshmen determines the average height of males to be 5'10 with a standard deviation of 1.5 inches. John has a Z score of +1.96, which means John is what height?

A ______ shows how random sampling error shapes the expected values of sampling statistics.

A particular number of cases drawn from the entire group a researcher wishes to study is known as a ______.

A Z score is a method used to ______ the scores in a normal distribution.

The standard error of a statistic is a single number.

The number of degrees of freedom is equal to the sample size, n, minus the number of parameters being estimated by the sample.

The US Census is an example of a ______.

In a normal distribution ______ percent of all scores fall with two standard deviations of the mean.

A normally distributed set of sample means resembles a standard bell curve.

The Definition and Measurement of Concepts

Measuring and Describing Variables

Proposing Explanations, Framing Hypotheses, and Making Comparisons

Research Design, Research Ethics, and Evidence of Causation

Making Controlled Comparisons

Tests of Significance and Measures of Association

Correlation and Linear Regression

Logistic Regression

Filters