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

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

Refer to the following information from a frequency distribution for "heights of college women" recorded to the nearest inch: the first two class midpoints are 62.5" and 65.5". What are the class limits for the third class?

When classes in a frequency table are constructed so that each observation will fit into only one class, the categories are ______________________.

To construct a bar chart, the class frequencies are plotted on the _________.

A pie chart shows the relative frequency in each class.

Refer to the following wage breakdown for a garment factory. What is the class midpoint for the class with the greatest frequency?

A group of 100 students were surveyed about their interest in a new Economics major. Interest was measured in terms of high, medium, or low. In the study, 30 students responded high interest, 50 students responded medium interest, and 20 students responded low interest. What is the best way to illustrate the relative frequency of student interest?

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

A table showing the number of observations that have been grouped into each of several classes is called a frequency ________________.

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

Refer to the following breakdown of responses to a survey of room service in a hotel. What type of chart should be used to show relative class frequencies?

The relative frequency for a class represents the ________________.

A sample distribution of hourly earnings in Paul's Cookie Factory is: The limits of the class with the smallest frequency are:

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

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

In a relative frequency distribution, the sum of the relative class frequencies is _____________________.

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. What is the class interval for the following frequency table?

Why are unequal class intervals sometimes used in a frequency distribution?