Question 1

All symmetrical curves must be bell-shaped. Is this true? Explain and give an example.

Accepted Answer

No, it is not true that all symmetrical

Question 2

The lower limit in the lowest class interval should equal i .

Accepted Answer

A) True 
 B)False

Question 3

Consider the following stem-and-leaf diagram.   This score distribution is _______.

Accepted Answer

A)  positively skewed 
B)  negatively skewed 
C)  symmetrical 
D)  neither skewed or symmetrical 
A)  positively skewed 
B)  negatively skewed 
C)  symmetrical 
D)  neither skewed or symmetrical

Question 4

What is wrong with the following frequency distribution?

Accepted Answer

The answer of What is wrong with the following frequency...

Question 5

The true limits of 7.0 are _________.

Accepted Answer

A)  6.5-7.5 
B)  6.0-8.0 
C)  7.0-7.1 
D)  6.95-7.05 
A)  6.5-7.5 
B)  6.0-8.0 
C)  7.0-7.1 
D)  6.95-7.05

Question 6

Define stem and leaf diagram.

Accepted Answer

A stem-and-leaf diagram, also known as a

Question 7

Give an example of a histogram. Be sure to label the axes and the variable plotted.

Accepted Answer

A histogram is a graphical representatio

Question 8

The distribution of scores of high school seniors on a sixth grade math test would probably be _________.

Accepted Answer

A)  positively skewed 
B)  negatively skewed 
C)  normal 
D)  symmetrical but not normal 
A)  positively skewed 
B)  negatively skewed 
C)  normal 
D)  symmetrical but not normal

Question 9

If a large psychology class took a test on theoretical biophysics, the distribution of scores would probably be _________.

Accepted Answer

A)  positively skewed 
B)  symmetrical 
C)  negatively skewed 
D)  ogival 
A)  positively skewed 
B)  symmetrical 
C)  negatively skewed 
D)  ogival

Question 10

A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data.   The cumulative % for the interval 46-55 is _________.

Accepted Answer

A)  8.89% 
B)  20.00% 
C)  0.64% 
D)  28.89% 
A)  8.89% 
B)  20.00% 
C)  0.64% 
D)  28.89%

Question 11

The first step in making a frequency distribution is to rank order the scores. Generally this is done by ranking scores from lowest to highest. Rank order the following scores: 30, 20, 21, 25, 5, 18, 18, 16, 10

Accepted Answer

To create a frequency distribution, the

Question 12

A curve is negatively skewed when _________.

Accepted Answer

A)  most of the scores occur at the lower end of the horizontal axis and the curve tails off toward the higher end 
B)  it is folded in half and the two sides do not coincide 
C)  most of the scores occur at the higher end of the horizontal axis and the curve tails off toward the lower end. 
D)  b and c 
A)  most of the scores occur at the lower end of the horizontal axis and the curve tails off toward the higher end 
B)  it is folded in half and the two sides do not coincide 
C)  most of the scores occur at the higher end of the horizontal axis and the curve tails off toward the lower end. 
D)  b and c

Question 13

Consider the frequency distribution shown in the table below.

Accepted Answer

The answer of Consider the frequency distribution shown in the...

Question 14

In grouping scores, the wider the intervals, the more information that is lost.

Accepted Answer

A) True 
 B)False

Question 15

Assume your task is to group the raw scores given below into a frequency distribution of approximately 12 intervals of equal width.   The interval containing the most scores is _________.

Accepted Answer

A)  60-64 
B)  62-66 
C)  62-67 
D)  60-65 
A)  60-64 
B)  62-66 
C)  62-67 
D)  60-65

Question 16

Define relative frequency distribution.

Accepted Answer

A relative frequency distribution is a s

Question 17

Bar graphs are generally used for nominal or ordinal data and histograms are generally used for interval or ratio data.

Accepted Answer

A) True 
 B)False

Question 18

An accountant is preparing a graph showing the number of sports cars of various makers purchased this year. The number will be plotted on the ordinate and the various manufacturers on the abscissa. The proper type of graph for this data is a(n) _________.

Accepted Answer

A)  frequency polygon 
B)  histogram 
C)  bar graph 
D)  ogive 
A)  frequency polygon 
B)  histogram 
C)  bar graph 
D)  ogive

Question 19

A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown below arranged in a frequency distribution of grouped scores.   The cumulative frequency for the interval 6.0-6.3 is _________.

Accepted Answer

A)  20 
B)  0.57 
C)  17 
D)  57 
A)  20 
B)  0.57 
C)  17 
D)  57

Question 20

A frequency distribution of grouped scores is used for distributions that have relatively few scores to stretch them out.

Accepted Answer

A) True 
 B)False

All symmetrical curves must be bell-shaped. Is this true? Explain and give an example.

The lower limit in the lowest class interval should equal i .

Consider the following stem-and-leaf diagram. This score distribution is _______.

What is wrong with the following frequency distribution?

The true limits of 7.0 are _________.

Define stem and leaf diagram.

Give an example of a histogram. Be sure to label the axes and the variable plotted.

The distribution of scores of high school seniors on a sixth grade math test would probably be _________.

If a large psychology class took a test on theoretical biophysics, the distribution of scores would probably be _________.

A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data. The cumulative % for the interval 46-55 is _________.

The first step in making a frequency distribution is to rank order the scores. Generally this is done by ranking scores from lowest to highest. Rank order the following scores: 30, 20, 21, 25, 5, 18, 18, 16, 10

A curve is negatively skewed when _________.

Consider the frequency distribution shown in the table below.

In grouping scores, the wider the intervals, the more information that is lost.

Assume your task is to group the raw scores given below into a frequency distribution of approximately 12 intervals of equal width. The interval containing the most scores is _________.

Define relative frequency distribution.

Bar graphs are generally used for nominal or ordinal data and histograms are generally used for interval or ratio data.

An accountant is preparing a graph showing the number of sports cars of various makers purchased this year. The number will be plotted on the ordinate and the various manufacturers on the abscissa. The proper type of graph for this data is a(n) _________.

A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown below arranged in a frequency distribution of grouped scores. The cumulative frequency for the interval 6.0-6.3 is _________.

A frequency distribution of grouped scores is used for distributions that have relatively few scores to stretch them out.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Measures of Central Tendency and Variability

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 3: Frequency Distributions

All symmetrical curves must be bell-shaped. Is this true? Explain and give an example.

The lower limit in the lowest class interval should equal i .

Consider the following stem-and-leaf diagram. This score distribution is _______.

What is wrong with the following frequency distribution?

The true limits of 7.0 are _________.

Define stem and leaf diagram.

Give an example of a histogram. Be sure to label the axes and the variable plotted.

The distribution of scores of high school seniors on a sixth grade math test would probably be _________.

If a large psychology class took a test on theoretical biophysics, the distribution of scores would probably be _________.

A psychologist is interested in the social interactions of preschool children. She measures the number of verbal interactions that each child at a preschool engages in during a day. Here is the frequency distribution of the data. The cumulative % for the interval 46-55 is _________.

The first step in making a frequency distribution is to rank order the scores. Generally this is done by ranking scores from lowest to highest. Rank order the following scores: 30, 20, 21, 25, 5, 18, 18, 16, 10

A curve is negatively skewed when _________.

Consider the frequency distribution shown in the table below.

In grouping scores, the wider the intervals, the more information that is lost.

Assume your task is to group the raw scores given below into a frequency distribution of approximately 12 intervals of equal width. The interval containing the most scores is _________.

Define relative frequency distribution.

Bar graphs are generally used for nominal or ordinal data and histograms are generally used for interval or ratio data.

An accountant is preparing a graph showing the number of sports cars of various makers purchased this year. The number will be plotted on the ordinate and the various manufacturers on the abscissa. The proper type of graph for this data is a(n) _________.

A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown below arranged in a frequency distribution of grouped scores. The cumulative frequency for the interval 6.0-6.3 is _________.

A frequency distribution of grouped scores is used for distributions that have relatively few scores to stretch them out.

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Measures of Central Tendency and Variability

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