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

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

Ages (rounded to the nearest whole year) of employees at a large company were grouped into a distribution with the following 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 midpoint for the class 40 up to 50?

What is the difference between a bar chart and a pie chart?

A student was studying the political party preferences of a university's student population. The survey instrument asked students to identify their political preference, for example, Democrat, Republican, Libertarian, or another party. The best way to illustrate the frequencies for each political preference is a __________.

Refer to the following wage breakdown for a garment factory. What is the class interval for the preceding table of wages?

The midpoint of a class, which is also called a class mark, is halfway between the lower and upper limits.

The first three class marks for a frequency distribution of "weights of college men" recorded to the nearest pound are 105, 115, and 125. What is the lower limit for the third class?

Ages (rounded to the nearest whole year) of employees at a large company were grouped into a distribution with the following 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?

The number of employees less than the upper limit of each class at Lloyd's Fast Food Emporium is shown in the following table: What is it called?

The first three class marks for a frequency distribution of "weights of college men" recorded to the nearest pound are 105, 115, and 125. What is the upper limit for the third class?

Refer to the following breakdown of responses to a survey of "How confident are you that you saved enough to retire?" What is the class interval for the preceding frequency table?

Refer to the following breakdown of responses to a survey of room cleanliness in a hotel. Draw a pie chart that illustrates the relative frequencies.

The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. What is the relative frequency of the orders delivered from 1 day up to 3 days?

What is the following table called?

Refer to the following wage breakdown for a garment factory. What are the class limits for the class with the smallest frequencies?

A frequency polygon is a very useful graphic technique when comparing two or more distributions.

A data set has 200 observations. In the data, a qualitative variable's highest value is "extremely satisfied" and its lowest value is "extremely dissatisfied." What is the minimum class interval that you would recommend?

The suggested class interval for a frequency distribution with data ranges from 100 to 220 with 50 observations would be _______.

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

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?