Exam 2: Descriptive Statistics: Tabular and Graphical Presentations

For the following observations, plot a scatter diagram and indicate what kind of relationship (if any) exist between x and y.

Categorical data can be graphically represented by using a(n)

When a histogram has a longer tail to the right, it is said to be

A tabular summary of a set of data showing the fraction of the total number of items in several classes is a

A frequency distribution is

In constructing a frequency distribution, the approximate class width is computed as

Exhibit 2-1 The numbers of hours worked (per week) by 400 statistics students are shown below. -Refer to Exhibit 2-1. The relative frequency of students working 9 hours or less

The relative frequency of a class is computed by

Exhibit 2-2 A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. -Refer to Exhibit 2-2. Among the students who plan to go to graduate school, what percentage indicated "Other" majors?

In a cumulative frequency distribution, the last class will always have a cumulative frequency equal to

Twenty employees of the Ahmadi Corporation were asked if they liked or disliked the new district manager. Below you are given their responses. Let L represent liked and D represent disliked. a.Construct a frequency distribution and a bar chart. b.Construct a relative frequency distribution and a pie chart.

Exhibit 2-2 A survey of 800 college seniors resulted in the following crosstabulation regarding their undergraduate major and whether or not they plan to go to graduate school. -Refer to Exhibit 2-2. What percentage of the students' undergraduate major is engineering?

Exhibit 2-3 Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below: Number of Laptops Sold Number of Days 0 - 19 5 20 - 39 15 40 - 59 30 60 - 79 20 80 - 99 10 Total 80 -Refer to Exhibit 2-3. The lower limit of the first class is

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to

Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) which can be used to present these data is (are)

Exhibit 2-3 Michael's Compute-All, a national computer retailer, has kept a record of the number of laptop computers they have sold for a period of 80 days. Their sales records are shown below: Number of Laptops Sold Number of Days 0 - 19 5 20 - 39 15 40 - 59 30 60 - 79 20 80 - 99 10 Total 80 -Refer to Exhibit 2-3. The percentage of days in which the company sold at least 40 laptops is

Forty shoppers were asked if they preferred the weight of a can of soup to be 6 ounces, 8 ounces, or 10 ounces. Below you are given their responses. a.Construct a frequency distribution and graphically represent the frequency distribution. b.Construct a relative frequency distribution and graphically represent the relative frequency distribution.

Thirty students in the School of Business were asked what their majors were. The following represents their responses (M = Management; A = Accounting; E = Economics; O = Others). a.Construct a frequency distribution and a bar chart. b.Construct a relative frequency distribution and a pie chart.

The sum of frequencies for all classes will always equal

A histogram is