Exam 2: Organizing and Visualizing Variables

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 went bar hopping the weekend before the midterm and did well on the midterm.

A histogram can have gaps between the bars, whereas bar charts cannot have gaps.

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. -Referring to Scenario 2-11, construct a histogram for the defects data, using "0 but less than 5" as the first class.

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.

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

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 the students in the population to spend the weekend studying and do poorly on the midterm.

SCENARIO 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. -Referring to Scenario 2-12, of the females in the sample, ________ percent were against the plan.

SCENARIO 2-4 A survey was conducted to determine how people rated the quality of programming available on television.Respondents were asked to rate the overall quality from 0 (no quality at all)to 100 (extremely good quality).The stem-and-leaf display of the data is shown below. -Referring to Scenario 2-4, what percentage of the respondents rated overall television quality with a rating from 50 through 75?

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 of at least 80?

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 _______.

You have collected data on the number of complaints for 6 different brands of automobiles sold in the US over a 10-year period.Which of the following is the best for presenting the data?

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

SCENARIO 2-12 The table below contains the opinions of a sample of 200 people broken down by gender about the latest congressional plan to eliminate anti-trust exemptions for professional baseball. -Referring to Scenario 2-12, of the females in the sample, ________ percent were either neutral or against the plan.