Question 1

Why is a cumulative relative frequency distribution so much more informative than just the relative frequency distribution?

Accepted Answer

Cumulative relative frequency distributions not only tell us the proportions or percentages in the sample or population less than a certain value,but we can take the differences and find the actual cumulative relative frequencies in each class from this distribution.Moreover,as long as we know the total sample or population size,you can get the actual frequencies as well.

Question 2

The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability.

Accepted Answer

A) True 
 B)False  False

Question 3

Suppose you were interested in determining the average monthly expenditures of college students on DVDs.How would you define the population for this problem? How would you obtain sample data for this study? Why would you want to ensure that you survey a random sample of college students?

Accepted Answer

We might be interested in determining these expenditures for all students currently enrolled in a four-year institution of higher learning in the United States.We would want to collect a random sample such that each of the thousands of students in the population is equally likely to be selected.We would not just want to study the expenditures of students at a private college,as their expenditures may be quite different from those of students in public colleges.

Question 4

A researcher used a procedure to select a sample of n objects from a population in such a way that each member of the population is chosen strictly by chance,is equally likely to be chosen,and every possible sample of size n has the same chance of selection.The procedure used by the researcher is known as:

Accepted Answer

A) descriptive statistics. 
B) inferential statistics. 
C) simple random sampling. 
D) None of the above 
A) descriptive statistics. 
B) inferential statistics. 
C) simple random sampling. 
D) None of the above

Question 5

An observed subset of the population that is usually selected for analysis is called:

Accepted Answer

A) knowledge. 
B) a sample. 
C) a statistic. 
D) a process. 
A) knowledge. 
B) a sample. 
C) a statistic. 
D) a process.

Question 6

Which of the following is a quantitative variable?

Accepted Answer

A) the make of a washing machine 
B) a person's gender 
C) price of a car in thousands of dollars 
D) whether a person is a college graduate or not 
A) the make of a washing machine 
B) a person's gender 
C) price of a car in thousands of dollars 
D) whether a person is a college graduate or not

Question 7

What type of graph does a stem-and-leaf resemble when turned vertically?

Accepted Answer

A) pie chart 
B) scatter plot 
C) histogram 
D) line chart 
A) pie chart 
B) scatter plot 
C) histogram 
D) line chart

Question 8

A parameter is a numerical measure that describes a specific characteristic of a sample.

Accepted Answer

A) True 
 B)False

Question 9

All graphic representations of sets of data need to be completely self-explanatory.That includes a descriptive meaningful title and identification of the vertical and horizontal scales.

Accepted Answer

A) True 
 B)False

Question 10

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Percentage returns for the 25 largest U.S.common stock mutual funds for a particular day are displayed below.
  
-Construct an ogive to describe the data.

Accepted Answer

The answer of THE NEXT QUESTIONS ARE BASED ON THE...

Question 11

A frequency distribution of numerical data differs from a frequency distribution for categorical data in that a frequency distribution for numerical data:

Accepted Answer

A) focuses on number and width of classes. 
B) does not contain classes. 
C) lists the classes in the right column. 
D) lists the observations in the left column. 
A) focuses on number and width of classes. 
B) does not contain classes. 
C) lists the classes in the right column. 
D) lists the observations in the left column.

Question 12

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The head of human resources at a corporation with 100 employees was curious about levels of employment by classification.She determined that 10% of all employees were classified as executive,15% as professional,25% as clerical and janitorial,30% as administrative and 20% as technical workers:
-Construct a pie chart to show this information.

Accepted Answer

The answer of THE NEXT QUESTIONS ARE BASED ON THE...

Question 13

Inferential statistics transform data into information.

Accepted Answer

A) True 
 B)False

Question 14

A pie chart is similar to a relative frequency distribution.

Accepted Answer

A) True 
 B)False

Question 15

When data is collected using a qualitative,nominal variable,what is true about a frequency distribution that summarizes the data?

Accepted Answer

A) Lower and upper class limits can be computed. 
B) Class midpoints can be computed. 
C) Number of classes corresponds to number of the variable's categories. 
D) None of the above 
A) Lower and upper class limits can be computed. 
B) Class midpoints can be computed. 
C) Number of classes corresponds to number of the variable's categories. 
D) None of the above

Question 16

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
The data in the next table indicate the number of degrees awarded from 2002 to 2008 by degree type at a four-year university in Utah.
  
-Graph the data with a time-series plot.

Accepted Answer

The answer of THE NEXT QUESTIONS ARE BASED ON THE...

Question 17

In completing a survey,respondents use the following number codes to indicate ages.
1 = Age 19 years and under,
2 = 20 to 29 years of age
3 = 30 to 39 years of age,
4 = Age 40 years and older
Is this data qualitative or quantitative? Explain.

Accepted Answer

This is qu

Question 18

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
In a recent marketing experiment,consumers were given one of four different types of dishwashing detergent and asked to use it for a month.At the end of that time they were asked to rate the detergent in terms of overall quality.The results are presented below.
  
-Of the customers who rated their detergent good,what percentage evaluated Brand C?

Accepted Answer

A) 23.6% 
B) 34.0% 
C) 8)0% 
D) 28.8% 
A) 23.6% 
B) 34.0% 
C) 8)0% 
D) 28.8%

Question 19

Which of the following statements is false?

Accepted Answer

A) A Pareto diagram is a bar graph with the bars arranged from the most numerous categories to the least numerous categories. 
B) A Pareto diagram includes a line graph displaying the cumulative percentages and counts for the bars. 
C) A Pareto diagram of types of defects will show the ones that have the greatest effect on the defective rate in order of effect.It is then easy to see which defects should be targeted in order to most effectively lower the defective rate. 
D) A Pareto diagram shows the most frequent bars on the right. 
A) A Pareto diagram is a bar graph with the bars arranged from the most numerous categories to the least numerous categories. 
B) A Pareto diagram includes a line graph displaying the cumulative percentages and counts for the bars. 
C) A Pareto diagram of types of defects will show the ones that have the greatest effect on the defective rate in order of effect.It is then easy to see which defects should be targeted in order to most effectively lower the defective rate. 
D) A Pareto diagram shows the most frequent bars on the right.

Question 20

Jersey numbers of basketball players are an example of the ordinal scale data.

Accepted Answer

A) True 
 B)False

Why is a cumulative relative frequency distribution so much more informative than just the relative frequency distribution?

The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability.

Suppose you were interested in determining the average monthly expenditures of college students on DVDs.How would you define the population for this problem? How would you obtain sample data for this study? Why would you want to ensure that you survey a random sample of college students?

An observed subset of the population that is usually selected for analysis is called:

Which of the following is a quantitative variable?

What type of graph does a stem-and-leaf resemble when turned vertically?

A parameter is a numerical measure that describes a specific characteristic of a sample.

All graphic representations of sets of data need to be completely self-explanatory.That includes a descriptive meaningful title and identification of the vertical and horizontal scales.

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: Percentage returns for the 25 largest U.S.common stock mutual funds for a particular day are displayed below. -Construct an ogive to describe the data.

A frequency distribution of numerical data differs from a frequency distribution for categorical data in that a frequency distribution for numerical data:

Inferential statistics transform data into information.

A pie chart is similar to a relative frequency distribution.

When data is collected using a qualitative,nominal variable,what is true about a frequency distribution that summarizes the data?

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: The data in the next table indicate the number of degrees awarded from 2002 to 2008 by degree type at a four-year university in Utah. -Graph the data with a time-series plot.

In completing a survey,respondents use the following number codes to indicate ages. 1 = Age 19 years and under, 2 = 20 to 29 years of age 3 = 30 to 39 years of age, 4 = Age 40 years and older Is this data qualitative or quantitative? Explain.

Which of the following statements is false?

Jersey numbers of basketball players are an example of the ordinal scale data.

Describing Data: Numerical

Probability

Discrete Random Variables and Probability Distributions

Continuous Random Variables and Probability Distributions

Sampling and Sampling Distributions

Estimation: Single Population

Estimation: Additional Topics

Hypothesis Testing: Single Population

Hypothesis Testing: Additional Topics

Simple Regression

Multiple Regression

Additional Topics in Regression Analysis

Analysis of Categorical Data

Analysis of Variance

Time-Series Analysis and Forecasting

Additional Topics in Sampling

Filters

Exam 1: Describing Data: Graphical

Why is a cumulative relative frequency distribution so much more informative than just the relative frequency distribution?

The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability.

Suppose you were interested in determining the average monthly expenditures of college students on DVDs.How would you define the population for this problem? How would you obtain sample data for this study? Why would you want to ensure that you survey a random sample of college students?

An observed subset of the population that is usually selected for analysis is called:

Which of the following is a quantitative variable?

What type of graph does a stem-and-leaf resemble when turned vertically?

A parameter is a numerical measure that describes a specific characteristic of a sample.

All graphic representations of sets of data need to be completely self-explanatory.That includes a descriptive meaningful title and identification of the vertical and horizontal scales.

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: Percentage returns for the 25 largest U.S.common stock mutual funds for a particular day are displayed below. -Construct an ogive to describe the data.

A frequency distribution of numerical data differs from a frequency distribution for categorical data in that a frequency distribution for numerical data:

Inferential statistics transform data into information.

A pie chart is similar to a relative frequency distribution.

When data is collected using a qualitative,nominal variable,what is true about a frequency distribution that summarizes the data?

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION: The data in the next table indicate the number of degrees awarded from 2002 to 2008 by degree type at a four-year university in Utah. -Graph the data with a time-series plot.

In completing a survey,respondents use the following number codes to indicate ages. 1 = Age 19 years and under, 2 = 20 to 29 years of age 3 = 30 to 39 years of age, 4 = Age 40 years and older Is this data qualitative or quantitative? Explain.

Which of the following statements is false?

Jersey numbers of basketball players are an example of the ordinal scale data.

Describing Data: Numerical

Probability

Discrete Random Variables and Probability Distributions

Continuous Random Variables and Probability Distributions

Sampling and Sampling Distributions

Estimation: Single Population

Estimation: Additional Topics

Hypothesis Testing: Single Population

Hypothesis Testing: Additional Topics

Simple Regression

Multiple Regression

Additional Topics in Regression Analysis

Analysis of Categorical Data

Analysis of Variance

Time-Series Analysis and Forecasting

Additional Topics in Sampling

Filters