Question 1

Given the following set of scores X : 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1 What is the median?

Accepted Answer

A)  8 
B)  9 
C)  10 
D)  11 
A)  8 
B)  9 
C)  10 
D)  11

Question 2

A history professor gives a quiz to his class and records the following scores: 13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20 . The standard deviation for this distribution is _________. Assume sample scores.

Accepted Answer

A)  3.12 
B)  3.00 
C)  13.26 
D)  12.74 
A)  3.12 
B)  3.00 
C)  13.26 
D)  12.74

Question 3

Variability and dispersion mean the same thing.

Accepted Answer

A) True 
 B)False

Question 4

An industrial psychologist observed 8 drill-press operators for one working day. She recorded the number of times each operator pressed the "faster" button instead of the "stop" button to determine whether the design of the control panel was contributing to the high rate of accidents in the plant. The resulting scores were as follows: 5, 2, 8, 2, 3, 2, 4, 12 The range for this distribution is _________.

Accepted Answer

A)  9 
B)  10 
C)  12 
D)  2 
A)  9 
B)  10 
C)  12 
D)  2

Question 5

is called _________.

Accepted Answer

A)  standard deviation 
B)  mean 
C)  variance 
D)  sum of squares 
E)  confusing 
A)  standard deviation 
B)  mean 
C)  variance 
D)  sum of squares 
E)  confusing

Question 6

Given the following set of scores X : 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1 What is the value of   ?

Accepted Answer

A)  4.54 
B)  206 
C)  1 
D)  0 
A)  4.54 
B)  206 
C)  1 
D)  0

Question 7

Define range.

Accepted Answer

The term "range" can have different mean

Question 8

The median is less subject to sampling variation than the mean.

Accepted Answer

A) True 
 B)False

Question 9

Define deviation score.

Accepted Answer

A deviation score is a statistical measu

Question 10

Is the overall mean a weighted mean? Explain.

Accepted Answer

The term "overall mean" typically refers

Question 11

Which is a better measure of variability, the variance or the standard deviation? Explain.

Accepted Answer

The standard deviation is a better measu

Question 12

equals _______ .

Accepted Answer

A)  ΣX 2 
B)  ΣX 2 - ( ΣX )2/N 
C)  cannot be determined from information provided 
D)  sum of squares 
E)  ΣX 2 - ( ΣX )2/N and sum of squares 
A)  ΣX 2 
B)  ΣX 2 - ( ΣX )2/N 
C)  cannot be determined from information provided 
D)  sum of squares 
E)  ΣX 2 - ( ΣX )2/N and sum of squares

Question 13

An industrial psychologist observed 8 drill-press operators for one working day. She recorded the number of times each operator pressed the "faster" button instead of the "stop" button to determine whether the design of the control panel was contributing to the high rate of accidents in the plant. The resulting scores were as follows: 5, 2, 8, 2, 3, 2, 4, 12 The mean for this distribution is _________.

Accepted Answer

A)  3.52 
B)  5.43 
C)  4.75 
D)  4.15 
A)  3.52 
B)  5.43 
C)  4.75 
D)  4.15

Question 14

When calculating the population standard deviation, we use N - 1 in the denominator.

Accepted Answer

A) True 
 B)False

Question 15

The mean is more often used for inference than the median.

Accepted Answer

A) True 
 B)False

Question 16

equals _______ .

Accepted Answer

A)  the sum of squares 
B)  0 
C)  1 
D)  cannot be determined 
A)  the sum of squares 
B)  0 
C)  1 
D)  cannot be determined

Question 17

Why do we use N - 1 in computing the standard deviation of a sample, but use N in computing the standard deviation of a population?

Accepted Answer

The distinction between using N - 1 and

Question 18

As a statistician (use your imagination), you are asked to recommend which measure of central tendency to use to characterize the following scores: 0.6, 0.2, 0.1, 0.2, 0.2, 0.4, 0.3, 0.7, 0.8, 0.1, 0.0, 0.5, 22.5, 0.4. 
 What is your recommendation and why?

Accepted Answer

As a statistician, I would recommend usi

Question 19

Central tendency and variability are synonymous.

Accepted Answer

A) True 
 B)False

Question 20

Define overall mean.

Accepted Answer

The overall mean, also known as the gran

Given the following set of scores X : 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1 What is the median?

A history professor gives a quiz to his class and records the following scores: 13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20 . The standard deviation for this distribution is _________. Assume sample scores.

Variability and dispersion mean the same thing.

is called _________.

Given the following set of scores X : 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1 What is the value of ?

Define range.

The median is less subject to sampling variation than the mean.

Define deviation score.

Is the overall mean a weighted mean? Explain.

Which is a better measure of variability, the variance or the standard deviation? Explain.

equals _______ .

When calculating the population standard deviation, we use N - 1 in the denominator.

The mean is more often used for inference than the median.

equals _______ .

Why do we use N - 1 in computing the standard deviation of a sample, but use N in computing the standard deviation of a population?

As a statistician (use your imagination), you are asked to recommend which measure of central tendency to use to characterize the following scores: 0.6, 0.2, 0.1, 0.2, 0.2, 0.4, 0.3, 0.7, 0.8, 0.1, 0.0, 0.5, 22.5, 0.4. What is your recommendation and why?

Central tendency and variability are synonymous.

Define overall mean.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

Exam 4: Measures of Central Tendency and Variability

Given the following set of scores X : 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1 What is the median?

A history professor gives a quiz to his class and records the following scores: 13, 11, 11, 9, 12, 13, 16, 14, 11, 10, 8, 13, 20 . The standard deviation for this distribution is _________. Assume sample scores.

Variability and dispersion mean the same thing.

is called _________.

Given the following set of scores X : 10, 12, 6, 8, 9, 11, 13, 13, 5, 0, 1 What is the value of ?

Define range.

The median is less subject to sampling variation than the mean.

Define deviation score.

Is the overall mean a weighted mean? Explain.

Which is a better measure of variability, the variance or the standard deviation? Explain.

equals _______ .

When calculating the population standard deviation, we use N - 1 in the denominator.

The mean is more often used for inference than the median.

equals _______ .

Why do we use N - 1 in computing the standard deviation of a sample, but use N in computing the standard deviation of a population?

As a statistician (use your imagination), you are asked to recommend which measure of central tendency to use to characterize the following scores: 0.6, 0.2, 0.1, 0.2, 0.2, 0.4, 0.3, 0.7, 0.8, 0.1, 0.0, 0.5, 22.5, 0.4. What is your recommendation and why?

Central tendency and variability are synonymous.

Define overall mean.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Analysis of Variance

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters