Exam 2: Presenting Data in Tables and Charts

The type of TV one owns is an example of an ordinal scaled variable.

TABLE 2-15 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. -Referring to Table 2-15, if the sample is a good representation of the population, we can expect ________ percent of those who own a portable DVD in the population will be males.

Northern Ireland is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for displaying this data?

Apple Computer, Inc. collected information on the age of their customers. 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.

TABLE 2-4 Every spring semester, the School of Business coordinates with local business leaders a luncheon for graduating seniors, their families, and friends. Corporate sponsorship pays for the lunches of each of the seniors, but students have to purchase tickets to cover the cost of lunches served to guests they bring with them. The following histogram represents the attendance at the senior luncheon, where X is the number of guests each graduating senior invited to the luncheon and f is the number of graduating seniors in each category. -Referring to the histogram from Table 2-4, if all the tickets purchased were used, how many guests attended the luncheon?

TABLE 2-5 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. 8 -Referring to Table 2-5, what percentage of the respondents rated overall television quality with a rating of 80 or above?

TABLE 2-14 Given below is the stem-and-leaf display representing the amount of detergent used in gallons (with leaves in 10ths of gallons) in a month by 25 drive-through car wash operations in Phoenix. -Referring to Table 2-14, 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.

The Dean of Students conducted a survey on campus. Number of clubs, groups, teams, and organizations affiliated with on campus is an example of a ________ numerical variable.

TABLE 2-15 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. -Referring to Table 2-15, ________ percent of the 600 were females who either owned or did not own a portable DVD.

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

In a contingency table, the number of rows and columns

TABLE 2-12 The ordered array below resulted from taking a sample of 25 batches of 500 computer chips and determining how many in each batch were defective. Defects -Referring to Table 2-12, construct a frequency distribution for the defects data, using "0 but less than 5" as the first class.

If you wish to construct a graph of a relative frequency distribution, you would most likely construct an ogive first.

An ogive is a cumulative percentage polygon.

TABLE 2-6 The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. -Referring to Table 2-6, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

TABLE 2-15 The table below contains the number of people who own a portable DVD player in a sample of 600 broken down by gender. -Referring to Table 2-15, construct a table of row percentages.

The answer to the question "How do you rate the quality of your business statistics course" is an example of an ordinal scaled variable.

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

In general, grouped frequency distributions should have between 5 and 15 class intervals.

To monitor campus security, the campus police office is taking a survey of the number of students in a parking lot each 30 minutes of a 24-hour period with the goal of determining when patrols of the lot would serve the most students. If X is the number of students in the lot each period of time, then X is an example of