Exam 2: Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

In a bar chart, why are there spaces between the bars on the horizontal axis?

A student was interested in the cigarette smoking habits of college students and collected data from an unbiased random sample of students. The data is summarized in the following table: What type of chart best represents relative class frequencies?

Refer to the following frequency distribution on days absent during a calendar year by employees of a manufacturing company: How many employees were absent six days or more?

To convert a frequency distribution to a relative frequency distribution, divide each class frequency by the number of classes.

A data set has 100 observations. In the data, a quantitative variable's highest value is 117 and its lowest value is 47. What is the minimum class interval that you would recommend? _____________

A pie chart is similar to a relative frequency distribution.

Refer to the following frequency distribution on days absent during a calendar year by employees of a manufacturing company: How many employees were absent from 6 up to 12 days?

A class interval, which is the width of a class, can be determined by subtracting the lower limit of a class from the lower limit of the next higher class.

Refer to the following breakdown of responses to a survey of "Are you concerned about being tracked while connected to the Internet"? What percent of the responses indicated that users were somewhat concerned?

In a cumulative frequency distribution, what percent of the total frequencies would fall below the upper limit of the highest class? ______

Refer to the following class marks or midpoints for a frequency distribution of "weights of college men" recorded to the nearest pound: The first three class marks are 105, 115, and 125. What are the class limits for the fourth class? _______ and _______

Refer to the following distribution of commissions: What is the class interval?

A class relative frequency represents a __________ of the total observations in the class.

Refer to the following ages (rounded to the nearest whole year) of employees at a large company that were grouped into a distribution with class limits: 20 up to 30 30 up to 40 40 up to 50 50 up to 60 60 up to 70 What is the class interval? ______

Refer to the following frequency distribution on days absent during a calendar year by employees of a manufacturing company: How many employees were absent between 3 up to 6 days?

Refer to the following class marks or midpoints for a frequency distribution of "weights of college men" recorded to the nearest pound: The first three class marks are 105, 115, and 125. What is the class interval? _____

In a frequency distribution, a class defined as "Under $100" and "$1,000 and over" is called an _____________________.

The midpoint of a class interval is also called a class __________.

Refer to the following distribution of commissions: What is the relative frequency for those salespersons that earn from $1,600 up to $1,800?

Refer to the following distribution of commissions: What is the relative frequency of those salespersons that earn $1,600 or more?