For the year 2006 , a large record company reported the following sales figures for various music media. \[\begin{array} { l | l } \text { Media } & \text { Sales (\$ millions) } \\ \hline \text { CD } & 1477.3 \\ \text { CD single } & 1.8 \\ \text { MP3 } & 65.9 \\ \text { Vinyl } & 2.6 \\ \text { Music video } & 531.4 \\ \text { Mini Disc } & 0.3 \\ \text { DVD } & 108.2 \\ \text { Cassette } & 3.4 \end{array}\] What kind of data is provided by the information in the first column?

A) Qualitative B) Quantitative A) Qualitative B) Quantitative

Identify the variable. -For the year 2006 , a large record company reported the following sales figures for various music media. $\begin{array}{l|l} \text { Media } & \text { Sales (\$ millions) } \\ \hline \text { CD } & 1477.3 \\ \text { CD single } & 1.8 \\ \text { MP3 } & 65.9 \\ \text { Vinyl } & 2.6 \\ \text { Music video } & 531.4 \\ \text { Mini Disc } & 0.3 \\ \text { DVD } & 108.2 \\ \text { Cassette } & 3.4 \end{array}$ Identify the variable under consideration in the first column?

A) media type B) 1477.3 C) CD D) sales A) media type B) 1477.3 C) CD D) sales

The following table gives the top five movies at the box office this week. \[\begin{array} { l | l | l | l | l } \text { Rank } & \text { Last week } & \text { Movie title } & \text { Studio } & \text { Box office sales (\$ millions) } \\ \hline 1 & \text { N/A } & \text { Pirate Adventure } & \text { Movie Giant } & 35.2 \\ 2 & 2 & \text { Secret Agent Files } & \text { G.M.G. } & 19.5 \\ 3 & 1 & \text { Epic Super Hero Team } & \text { 21st Century } & 14.3 \\ 4 & 5 & \text { Reptile Ride } & \text { Movie Giant } & 10.1 \\ 5 & 4 & \text { Must Love Cats } & \text { Dreamboat } & 9.9 \end{array}\] What kind of data is provided by the information in the second column?

A) Qualitative B) Quantitative A) Qualitative B) Quantitative

A large record company reported the following sales figures for various music media last year. \[\begin{array} { l | l } \text { Media } & \text { Sales (\$ millions) } \\ \hline \text { CD } & 1477.3 \\ \text { CD single } & 1.8 \\ \text { MP3 } & 65.9 \\ \text { Vinyl } & 2.6 \\ \text { Music video } & 531.4 \\ \text { Mini Disc } & 0.3 \\ \text { DVD } & 108.2 \\ \text { Cassette } & 3.4 \end{array}\] What kind of data is provided by the information in the second column?

A) Qualitative B) Quantitative A) Qualitative B) Quantitative

Use limit grouping to organize these data into a frequency distribution. -Kevin asked some of his friends how many hours they had worked during the previous week at their after-school jobs. The results are shown below. \[\begin{array} { l l l l l l l l l l l l } 6 & 5 & 6 & 3 & 6 & 6 & 9 & 8 & 6 & 4 & 8 & 5 \\ 5 & 8 & 6 & 5 & 8 & 6 & 5 & 8 & 5 & 8 & 8 & 3 \end{array}\] Construct a frequency distribution. Use 4 classes, a class width of 2 hours, and a lower limit of 3 for the first class. $\begin{array}{l|l} \text { Hours } & \text { Frequency } \\ \hline & \\ & \end{array}$

The answer of Use limit grouping to organize these data...

Classify the data as either qualitative or quantitative. -The following table gives the top five movies at the box office this week. \[\begin{array} { l | l | l | l | l } \text { Rank } & \text { Last week } & \text { Movie title } & \text { Studio } & \text { Box office sales (\$ millions) } \\ \hline 1 & \text { N/A } & \text { Pirate Adventure } & \text { Movie Giant } & 35.2 \\ 2 & 2 & \text { Secret Agent Files } & \text { G.M.G. } & 19.5 \\ 3 & 1 & \text { Epic Super Hero Team } & \text { 21st Century } & 14.3 \\ 4 & 5 & \text { Reptile Ride } & \text { Movie Giant } & 10.1 \\ 5 & 4 & \text { Must Love Cats } & \text { Dreamboat } & 9.9 \end{array}\] What kind of data is provided by the information in the third column?

A) Qualitative B) Quantitative A) Qualitative B) Quantitative

Shortly before an election, a market research firm took a poll to find out whether people were planning to vote for or against a particular ballot measure. The results are shown below. \[\begin{array} { l c } \text { Position } & \text { Frequency } \\ \hline \text { Against } & 3087 \\ \text { In favor } & 3691 \\ \text { Undecided } & 910 \end{array}\] The ballot measure will pass if a simple majority (more than 50%)vote in favor of the measure. You wish to construct a graph to represent the data. It should be easy to see from your graph whether more than 50% of the people are planning to vote in favor of the measure. Which graph would be more useful, a bar graph or a pie chart? Explain your thinking.

Answers will vary. Possible answer: A pi

The blood types for 40 people who agreed to participate in a medical study were as follows. \[\begin{array} { l l l l l l l l l l } \mathrm { O } & \mathrm { A } & \mathrm { A } & \mathrm { O } & \mathrm { O } & \mathrm { AB } & \mathrm { O } & \mathrm { B } & \mathrm { A } & \mathrm { O } \\ \mathrm { A } & \mathrm { O } & \mathrm { A } & \mathrm { B } & \mathrm { O } & \mathrm { O } & \mathrm { O } & \mathrm { AB } & \mathrm { A } & \mathrm { A } \\ \mathrm { A } & \mathrm { B } & \mathrm { O } & \mathrm { A } & \mathrm { A } & \mathrm { O } & \mathrm { O } & \mathrm { B } & \mathrm { O } & \mathrm { O } \\ \mathrm { O } & \mathrm { A } & \mathrm { O } & \mathrm { O } & \mathrm { A } & \mathrm { B } & \mathrm { O } & \mathrm { O } & \mathrm { A } & \mathrm { AB } \end{array}\] Construct a frequency distribution for the data.

A) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \mathrm{O} & 18 \\ \mathrm{~A} & 14 \\ \mathrm{~B} & 5 \\ \mathrm{AB} & 3 \end{array}$ B) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \mathrm{O} & 19 \\ \mathrm{~A} & 13 \\ \mathrm{~B} & 5 \\ \mathrm{AB} & 3 \end{array}$ C) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \mathrm{O} & 19 \\ \mathrm{~A} & 11 \\ \mathrm{~B} & 5 \\ \mathrm{AB} & 2 \end{array}$ D) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \text { O } & 20 \\ \text { A } & 13 \\ \text { B } & 4 \\ \text { AB } & 3 \end{array}$ A) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \mathrm{O} & 18 \\ \mathrm{~A} & 14 \\ \mathrm{~B} & 5 \\ \mathrm{AB} & 3 \end{array}$ B) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \mathrm{O} & 19 \\ \mathrm{~A} & 13 \\ \mathrm{~B} & 5 \\ \mathrm{AB} & 3 \end{array}$ C) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \mathrm{O} & 19 \\ \mathrm{~A} & 11 \\ \mathrm{~B} & 5 \\ \mathrm{AB} & 2 \end{array}$ D) $\begin{array}{cc} \text { Blood type } & \text { Frequency } \\ \hline \text { O } & 20 \\ \text { A } & 13 \\ \text { B } & 4 \\ \text { AB } & 3 \end{array}$

Exam 2: Organizing Data

A graphical display of a data set is given. State whether the distribution is (roughly)symmetric, right skewed, or leftskewed. -A frequency histogram is given below for the weights of a sample of college students.

(Multiple Choice)

4.7/5

(85)

Question 61

For the year 2006 , a large record company reported the following sales figures for various music media. Media Sales (\ millions) CD 1477.3 CD single 1.8 MP3 65.9 Vinyl 2.6 Music video 531.4 Mini Disc 0.3 DVD 108.2 Cassette 3.4 What kind of data is provided by the information in the first column?

(Multiple Choice)

4.9/5

(87)

Question 62

Suppose you are comparing frequency data for two different groups, 25 managers and 150 blue collar workers. Why would a relative frequency distribution be better than a frequency distribution?

(Essay)

4.8/5

(85)

Question 63

Identify the variable. -For the year 2006 , a large record company reported the following sales figures for various music media. Media Sales (\ millions) CD 1477.3 CD single 1.8 MP3 65.9 Vinyl 2.6 Music video 531.4 Mini Disc 0.3 DVD 108.2 Cassette 3.4 Identify the variable under consideration in the first column?

(Multiple Choice)

4.9/5

(78)

Question 64

The following table gives the top five movies at the box office this week. Rank Last week Movie title Studio Box office sales (\ millions) 1 N/A Pirate Adventure Movie Giant 35.2 2 2 Secret Agent Files G.M.G. 19.5 3 1 Epic Super Hero Team 21st Century 14.3 4 5 Reptile Ride Movie Giant 10.1 5 4 Must Love Cats Dreamboat 9.9 What kind of data is provided by the information in the second column?

(Multiple Choice)

4.9/5

(81)

Question 65

A graphical display of a data set is given. State whether the distribution is (roughly)symmetric, right skewed, or leftskewed. -A die was rolled 200 times and a record was kept of the numbers obtained. The results are shown in the relative frequency histogram below.

(Multiple Choice)

4.8/5

(80)

Question 66

Arranging the age of students in a class in from youngest to oldest yields ordinal data.

(True/False)

4.9/5

(77)

Question 67

Provide an appropriate response. -A table of random numbers is used to generate 100 random integers between 0 and 9. Do you think that the distribution of the numbers will be roughly uniform? Why or why not? In a second experiment, a table of random numbers is used to generate two random integers between 0 and 9 and the sum of the two numbers is recorded. This procedure is repeated 100 times. Do you think that the distribution of the sums will be roughly uniform? Why or why not?

(Essay)

4.9/5

(78)

Question 68

A large record company reported the following sales figures for various music media last year. Media Sales (\ millions) CD 1477.3 CD single 1.8 MP3 65.9 Vinyl 2.6 Music video 531.4 Mini Disc 0.3 DVD 108.2 Cassette 3.4 What kind of data is provided by the information in the second column?

(Multiple Choice)

4.8/5

(78)

Question 69

A discrete variable always yields numerical values.

(True/False)

4.9/5

(94)

Question 70

Provide an appropriate response. -Explain the difference between a frequency distribution and a relative frequency distribution. Comment on the differences on the vertical axis scale. Given the same data set and the same classes, will the shapes of the frequency distribution and the relative frequency distribution be the same? You may draw a diagram to support your answer.

(Essay)

4.9/5

(74)

Question 71

Use limit grouping to organize these data into a frequency distribution. -Kevin asked some of his friends how many hours they had worked during the previous week at their after-school jobs. The results are shown below. 6 5 6 3 6 6 9 8 6 4 8 5 5 8 6 5 8 6 5 8 5 8 8 3 Construct a frequency distribution. Use 4 classes, a class width of 2 hours, and a lower limit of 3 for the first class. Hours Frequency

(Essay)

4.8/5

(71)

Question 72

A variable whose possible values are 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, is a continuous variable.

(True/False)

4.9/5

(72)

Question 73

A high school teacher keeps a record of the number of days that each student attended school last year and then she constructs a relative frequency histogram. What do you think the shape of the distribution will be? Why?

(Essay)

4.8/5

(82)

Question 74

Classify the data as either qualitative or quantitative. -The following table gives the top five movies at the box office this week. Rank Last week Movie title Studio Box office sales (\ millions) 1 N/A Pirate Adventure Movie Giant 35.2 2 2 Secret Agent Files G.M.G. 19.5 3 1 Epic Super Hero Team 21st Century 14.3 4 5 Reptile Ride Movie Giant 10.1 5 4 Must Love Cats Dreamboat 9.9 What kind of data is provided by the information in the third column?

(Multiple Choice)

4.9/5

(81)

Question 75

Shortly before an election, a market research firm took a poll to find out whether people were planning to vote for or against a particular ballot measure. The results are shown below. Position Frequency Against 3087 In favor 3691 Undecided 910 The ballot measure will pass if a simple majority (more than 50%)vote in favor of the measure. You wish to construct a graph to represent the data. It should be easy to see from your graph whether more than 50% of the people are planning to vote in favor of the measure. Which graph would be more useful, a bar graph or a pie chart? Explain your thinking.

(Essay)

4.7/5

(81)

Question 76

The blood types for 40 people who agreed to participate in a medical study were as follows. Construct a frequency distribution for the data.

(Multiple Choice)

4.8/5

(88)

Question 77

The bar graph below shows the number of car accidents occurring in one city in each of the years 2001 through 2006. The number of accidents dropped in 2003 after a new speed limit was imposed. Why is the graph misleading? How would you redesign the graph to be less misleading?

(Essay)

4.9/5

(65)

Question 78

Construct the requested histogram. -The table gives the frequency distribution for the data involving the number of television sets per household for a sample of 100 U.S. households. \# of TVs Frequency 1 20 2 50 3 15 4 10 5 5 Construct a relative frequency histogram. $Construct the requested histogram. -The table gives the frequency distribution for the data involving the number of television sets per household for a sample of 100 U.S. households. \begin{array} { c | c } \text { \# of TVs } & \text { Frequency } \\ \hline 1 & 20 \\ 2 & 50 \\ 3 & 15 \\ 4 & 10 \\ 5 & 5 \end{array} Construct a relative frequency histogram.$

(Essay)

4.9/5

(81)

Question 79

Scott Tarnowski owns a pet grooming shop. His prices for grooming dogs are based on the size of the dog. His records from last year are summarized below. Construct a relative frequency distribution. Class Frequency Large 345 Medium 830 Small 645

(Essay)

4.8/5

(72)

Question 80

A graphical display of a data set is given. State whether the distribution is (roughly)symmetric, right skewed, or leftskewed. -A frequency histogram is given below for the weights of a sample of college students.

For the year 2006 , a large record company reported the following sales figures for various music media. Media Sales (\ millions) CD 1477.3 CD single 1.8 MP3 65.9 Vinyl 2.6 Music video 531.4 Mini Disc 0.3 DVD 108.2 Cassette 3.4 What kind of data is provided by the information in the first column?

Suppose you are comparing frequency data for two different groups, 25 managers and 150 blue collar workers. Why would a relative frequency distribution be better than a frequency distribution?

A graphical display of a data set is given. State whether the distribution is (roughly)symmetric, right skewed, or leftskewed. -A die was rolled 200 times and a record was kept of the numbers obtained. The results are shown in the relative frequency histogram below.

Arranging the age of students in a class in from youngest to oldest yields ordinal data.

A large record company reported the following sales figures for various music media last year. Media Sales (\ millions) CD 1477.3 CD single 1.8 MP3 65.9 Vinyl 2.6 Music video 531.4 Mini Disc 0.3 DVD 108.2 Cassette 3.4 What kind of data is provided by the information in the second column?

A discrete variable always yields numerical values.

A variable whose possible values are 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, is a continuous variable.

A high school teacher keeps a record of the number of days that each student attended school last year and then she constructs a relative frequency histogram. What do you think the shape of the distribution will be? Why?

The blood types for 40 people who agreed to participate in a medical study were as follows. Construct a frequency distribution for the data.

The bar graph below shows the number of car accidents occurring in one city in each of the years 2001 through 2006. The number of accidents dropped in 2003 after a new speed limit was imposed. Why is the graph misleading? How would you redesign the graph to be less misleading?

Scott Tarnowski owns a pet grooming shop. His prices for grooming dogs are based on the size of the dog. His records from last year are summarized below. Construct a relative frequency distribution. Class Frequency Large 345 Medium 830 Small 645

The Nature of Statistics

Descriptive Measures

Probability Concepts

Discrete Random Variables

The Normal Distribution

The Sampling Distribution of the Sample Mean

Confidence Intervals for One Population Mean

Hypothesis Tests for One Population Mean

Inferences for Two Population Means

Inferences for Population Standard Deviations

Inferences for Population Proportions

Chi-Square Procedures

Descriptive Methods in Regression and Correlation

Inferential Methods in Regression and Correlation

Analysis of Variance Anova

Filters