Exam 2: Organizing and Visualizing Variables

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,_____of the 100 members visited the health club no more than 12 times in a year.

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,_____percent of the students in the sample spent the weekend studying and did well on the midterm.

The Guidelines for Developing Visualizations recommend avoiding uncommon chart type such as doughnut,radar,cone and pyramid charts.

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 is best to use a pie chart.

A survey of 150 executives were asked what they think is the most common mistake candidates make during job interviews.Six different mistakes were given.Which of the following is the best for presenting the information?

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,if the sample is a good representation of the population,we can expect_____ percent of those who spent the weekend studying to do poorly on the midterm.

Data on the number of part-time hours students at a public university worked in a week were collected.Which of the following is the best chart for presenting the information?

When constructing a frequency distribution,classes should be selected so that they are of equal width.

The width of each class grouping or interval in a frequency distribution should be_____ .

Determining the class boundaries of a frequency distribution is highly subjective.

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 job applicants scored between 10 and 20.

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 job applicants scored below 50.

SCENARIO 2-18 The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction. -Referring to Scenario 2-18,how many students have a satisfaction level below 60?

SCENARIO 2-18 The stem-and-leaf display below shows the result of a survey on 50 students on their satisfaction with their school with the higher scores represent higher level of satisfaction. -Referring to Scenario 2-18,the level of satisfaction is concentrated around 75.

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,if the sample is a good representation of the population,we can expect _____percent of the males in the population will own a portable Blu-ray player.

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 class midpoint of the third 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 percentage polygon for the detergent data if the corresponding frequency distribution uses "9.0 but less than 10.0" as the first class.

The percentage distribution cannot be constructed from the frequency distribution directly.

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 of the females in the sample,_____percent owned a portable Blu-ray player.

The sum of cumulative frequencies in a distribution always equals 1.