Exam 2: Descriptive Statistics: Tabular and Graphical Displays

If several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the

d. 60 ANSWER: c Exhibit 2-4 A sample of 15 children shows their favorite restaurant: McDonalds Luppi's Mellow Mushroom Friday's McDonalds McDonalds Pizza Hut Taco Bell McDonalds Mellow Mushroom Luppi's Pizza Hut McDonalds Friday's McDonalds -Refer to Exhibit 2-4. Determine the relative frequency for McDonalds.

The frequency distribution below was constructed from data collected on the quarts of soft drinks consumed per week by 20 students. Qurarts af Soft Drink Frequency 0-3 4 4-7 5 8-11 6 12-15 3 16-19 2 a. Construct a relative frequency distribution. b. Construct a cumulative frequency distribution. c. Construct a cumulative relative frequency distribution.

Exhibit 2-1 The number of hours worked per week) by 400 statistics students are shown below. Number of Hours Frequency 0-9 20 10-19 80 20-29 200 30-39 100 -Refer to Exhibit 2-1. The cumulative percent frequency for the class of 30 - 39 is

Exhibit 2-1 The number of hours worked per week) by 400 statistics students are shown below. Number of Hours Frequency 0-9 20 10-19 80 20-29 200 30-39 100 -Refer to Exhibit 2-1. The percentage of students who work at least 10 hours per week is

Categorical data can be graphically represented by using an)

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

A line that provides an approximation of the relationship between two variables is known as the

The can be used to show the rank order and shape of a data set simultaneously.

In constructing a frequency distribution, as the number of classes are decreased, the class width

The percent frequency of a class is computed by

The relative frequency of a class is computed by

For the following observations, plot a scatter diagram and indicate what kind of relationship if any) exist between x and y. x y 2 7 6 19 3 9 5 17 4 11

The sum of the relative frequencies for all classes will always equal

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 number of days in which the company sold less than 60 laptops is

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

There are 800 students in the School of Business Administration. There are four majors in the School: Accounting, Finance, Management, and Marketing. The following shows the number of students in each major. major Number of Students Accounting 240 Finance 160 Management 320 Marketing 80 Develop a percent frequency distribution and construct a bar chart and a pie chart.

The reversal of conclusions based on aggregate and unaggregated data is called

The total number of data items with a value less than the upper limit for the class is given by the

For the following observations, plot a scatter diagram and indicate what kind of relationship if any) exist between x and y. x y 8 4 5 5 3 9 2 12 1 14