Question 1

The sum of relative frequencies found in a relative frequency distribution for quantitative data necessarily equals:

Accepted Answer

A)  0 
B)  1 
C)  100 
D)  n, the number observations in the data set 
E)  the number of collectively exhaustive and mutually exclusive class in a frequency distribution 
A)  0 
B)  1 
C)  100 
D)  n, the number observations in the data set 
E)  the number of collectively exhaustive and mutually exclusive class in a frequency distribution

Question 2

Individual observations within each class may be found in a frequency distribution.

Accepted Answer

A) True 
 B)False

Question 3

The following data represents the number of pages of notes per lecture taken by a student in a beginning statistics course.
1 5 2 6 2 3 3 4 4 4 5
5 5 5 5 5 6 6 6 6 6 6
6 6 5 6 4 5 6
a. Construct a dotplot to describe the data.
b. Would you describe the distribution of the data as symmetric, skewed to the right or skewed to the left?
______________
c. Explain.
________________________________________________________

Accepted Answer

@#IMG-DLM& Skewed left; The distribution

Question 4

A dotplot is a graphical portrayal of an absolute or relative frequency distribution of continuous quantitative data in such a way that lower and upper limits of data classes are identified by tick marks on a horizontal axis, while the corresponding absolute or relative class frequencies are represented by the areas of contiguous rectangles that stand on top of each of these class intervals.

Accepted Answer

A) True 
 B)False

Question 5

A relative frequency histogram can be constructed for qualitative as well as quantitative data.

Accepted Answer

A) True 
 B)False

Question 6

A variable is a characteristic that changes or varies over time, and/or for different individuals or objects under consideration. An experimental unit is the individual or object on which a variable is measured.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements is true?

Accepted Answer

A)  Univariate data result when a single variable is measured on a single experimental unit. 
B)  Bivariate data result when less than two variables are measured on a single experimental unit. 
C)  Multivariate data result when more than two variables are measured. 
D)  Both univariate data result when a single variable is measured on a single experimental unit and multivariate data result when more than two variables are measured are true. 
E)  Both bivariate data result when less than two variables are measured on a single experimental unit and multivariate data result when more than two variables are measured are true. 
A)  Univariate data result when a single variable is measured on a single experimental unit. 
B)  Bivariate data result when less than two variables are measured on a single experimental unit. 
C)  Multivariate data result when more than two variables are measured. 
D)  Both univariate data result when a single variable is measured on a single experimental unit and multivariate data result when more than two variables are measured are true. 
E)  Both bivariate data result when less than two variables are measured on a single experimental unit and multivariate data result when more than two variables are measured are true.

Question 8

Relative frequency distributions are specifically constructed for analyzing discrete data.

Accepted Answer

A) True 
 B)False

Question 9

The total area of the bars in a relative frequency histogram:

Accepted Answer

A)  depends on the sample size 
B)  depends on the number of bars 
C)  depends on the width of each bar 
D)  depends on the population size 
E)  depends on the frequency 
A)  depends on the sample size 
B)  depends on the number of bars 
C)  depends on the width of each bar 
D)  depends on the population size 
E)  depends on the frequency

Question 10

A stem-and-leaf plot describes two-digit integers between 30 and 80. For one of the classes displayed, the row appears as 5|234. The numerical values being described are 25, 35, and 45.

Accepted Answer

A) True 
 B)False

Question 11

Twenty-five percent of a sample of 200 professional tennis players indicated that their parents did not play tennis. This is an example of descriptive statistics as opposed to inferential statistics.

Accepted Answer

A) True 
 B)False

Question 12

Bar and pie charts are graphical techniques for qualitative data. The former focus the attention on the frequency of the occurrences of the categories, and the later emphasize the percentage of occurrences of each category.

Accepted Answer

A) True 
 B)False

Question 13

A branch of the statistics discipline that is used to develop and utilize techniques for properly making inferences about population characteristics from information contained in a sample drawn from this population is called inferential statistics.

Accepted Answer

A) True 
 B)False

Question 14

A pie chart is a portrayal of divisions of some aggregate by a segmented circle in such a way that the sector areas are proportional to the sized of the divisions in question.

Accepted Answer

A) True 
 B)False

The sum of relative frequencies found in a relative frequency distribution for quantitative data necessarily equals:

Individual observations within each class may be found in a frequency distribution.

A relative frequency histogram can be constructed for qualitative as well as quantitative data.

A variable is a characteristic that changes or varies over time, and/or for different individuals or objects under consideration. An experimental unit is the individual or object on which a variable is measured.

Which of the following statements is true?

Relative frequency distributions are specifically constructed for analyzing discrete data.

The total area of the bars in a relative frequency histogram:

A stem-and-leaf plot describes two-digit integers between 30 and 80. For one of the classes displayed, the row appears as 5|234. The numerical values being described are 25, 35, and 45.

Twenty-five percent of a sample of 200 professional tennis players indicated that their parents did not play tennis. This is an example of descriptive statistics as opposed to inferential statistics.

Bar and pie charts are graphical techniques for qualitative data. The former focus the attention on the frequency of the occurrences of the categories, and the later emphasize the percentage of occurrences of each category.

A branch of the statistics discipline that is used to develop and utilize techniques for properly making inferences about population characteristics from information contained in a sample drawn from this population is called inferential statistics.

A pie chart is a portrayal of divisions of some aggregate by a segmented circle in such a way that the sector areas are proportional to the sized of the divisions in question.

Describing Data With Numerical Measures

Describing Bivariate Data

Probability and Probability Distributions

Several Useful Discrete Distributions

The Normal Probability Distribution

Sampling Distributions

Large-Sample Estimation

Large-Sample Tests of Hypotheses

Inference From Small Samples

The Analysis of Variance

Linear Regression and Correlation

Multiple Regression Analysis

Analysis of Categorical Data

Nonparametric Statistics

Filters

Exam 1: Describing Data With Graphs

The sum of relative frequencies found in a relative frequency distribution for quantitative data necessarily equals:

Individual observations within each class may be found in a frequency distribution.

A relative frequency histogram can be constructed for qualitative as well as quantitative data.

A variable is a characteristic that changes or varies over time, and/or for different individuals or objects under consideration. An experimental unit is the individual or object on which a variable is measured.

Which of the following statements is true?

Relative frequency distributions are specifically constructed for analyzing discrete data.

The total area of the bars in a relative frequency histogram:

A stem-and-leaf plot describes two-digit integers between 30 and 80. For one of the classes displayed, the row appears as 5|234. The numerical values being described are 25, 35, and 45.

Twenty-five percent of a sample of 200 professional tennis players indicated that their parents did not play tennis. This is an example of descriptive statistics as opposed to inferential statistics.

Bar and pie charts are graphical techniques for qualitative data. The former focus the attention on the frequency of the occurrences of the categories, and the later emphasize the percentage of occurrences of each category.

A branch of the statistics discipline that is used to develop and utilize techniques for properly making inferences about population characteristics from information contained in a sample drawn from this population is called inferential statistics.

A pie chart is a portrayal of divisions of some aggregate by a segmented circle in such a way that the sector areas are proportional to the sized of the divisions in question.

Describing Data With Numerical Measures

Describing Bivariate Data

Probability and Probability Distributions

Several Useful Discrete Distributions

The Normal Probability Distribution

Sampling Distributions

Large-Sample Estimation

Large-Sample Tests of Hypotheses

Inference From Small Samples

The Analysis of Variance

Linear Regression and Correlation

Multiple Regression Analysis

Analysis of Categorical Data

Nonparametric Statistics

Filters