Exam 2: Organizing and Visualizing Variables

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-13,construct a cumulative percentage distribution for the detergent data if the corresponding frequency distribution uses "9.0 but less than 10.0" as the first class.

One of the advantages of a pie chart is that it clearly shows that the total of all the categories of the pie adds to 100%.

SCENARIO 2-11 The ordered array below resulted from selecting a sample of 25 batches of 500 computer chips and determining how many in each batch were defective. Defects 1 2 4 4 5 5 6 7 9 9 12 12 15 17 20 21 23 23 25 26 27 27 28 29 29 -Referring to Scenario 2-11,construct a relative frequency or percentage distribution for the defects data,using "0 but less than 5" as the first class.

Ogives are plotted at the midpoints of the class groupings.

A professor of economics at a small Texas university wanted to determine what year in school students were taking his tough economics course.Shown below is a pie chart of the results.What percentage of the class took the course prior to reaching their senior year?

A side-by-side bar chart is two histograms plotted side-by-side.

The addition of visual elements that either fail to convey any useful information or that obscure important points about the data to enhance the visualization of data is called_____ .

When comparing two or more large sets of numerical data,the distributions being developed should use the same_____ .

SCENARIO 2-6 A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying,and whether they did well or poorly on the midterm.The following table contains the result. -Referring to Scenario 2-6,of those who did well on the midterm in the sample,_____percent of them went bar hopping the weekend before the midterm.

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-14,construct a table of column percentages.

SCENARIO 2-6 A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying,and whether they did well or poorly on the midterm.The following table contains the result. -Referring to Scenario 2-6,of those who went bar hopping the weekend before the midterm in the sample,____percent of them did well on the midterm.

SCENARIO 2-10 The histogram below represents scores achieved by 200 job applicants on a personality profile. -Referring to the histogram from Scenario 2-10,_____percent of the applicants scored below 20 or at least 50.

SCENARIO 2-5 The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. -Referring to Scenario 2-5,what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

SCENARIO 2-5 The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. -Referring to Scenario 2-5,if 100 calls were randomly sampled,how many calls lasted 15 minutes or longer?

To evaluate two categorical variables at the same time,a_____ could be developed.

SCENARIO 2-8 The Stem-and-Leaf display represents the number of times in a year that a random sample of 100 "lifetime" members of a health club actually visited the facility. -Referring to Scenario 2-8,if a frequency distribution with equal sized classes was made from this data,and the first class was "0 but less than 10," the cumulative percentage of the next-to-last class would be_____ .

SCENARIO 2-14 The table below contains the number of people who own a portable Blu-ray player in a sample of 600 broken down by gender. -Referring to Scenario 2-13,construct a frequency distribution for the detergent data,using "9.0 but less than 10.0 gallons" as the first class.

You have collected data on the responses to two questions asked in a survey of 40 college students majoring in business-What is your gender (Male = M;Female = F)and What is your major (Accountancy = A;Computer Information Systems = C;Marketing = M).Which of the following is the best for presenting the data?

SCENARIO 2-7 The Stem-and-Leaf display below contains data on the number of months between the date a civil suit is filed and when the case is actually adjudicated for 50 cases heard in superior court. -Referring to Scenario 2-7,locate the first leaf,i.e. ,the lowest valued leaf with the lowest valued stem.This represents a wait of_____ months.

Apple Computer,Inc.collected information on the age of their customers.Suppose the youngest customer was 12 and the oldest was 72.To study the distribution of the age among its customers,it can use a percentage polygon.