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

For a frequency distribution of qualitative data, if the observations can be assigned to only one class, the classes are __________________________.

In a frequency distribution, the number of observations in a class is called the class ________.

Refer to the following distribution of ages: For the distribution of ages just shown, what is the relative class frequency for the lowest class?

In a bar chart, the heights of the bars represent the frequencies in each class.

A ______ chart is useful for displaying a relative frequency distribution.

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

When a class interval is expressed as 100 up to 200, _________________________.

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

For a frequency distribution of quantitative data, if every individual, object, or measurement can be assigned to a class, the frequency distribution is __________.

What is the following table called?

The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. For 300 observations, our rule-of-thumb for number of classes would indicate 9 classes. In this case, what is the class interval and why would it be reasonable to use that class interval and only 6 classes?

Refer to the following breakdown of responses to a survey of room service in a hotel. What type of chart should be used to describe the frequency table?

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 for orders delivered in less than one day?

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?

The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. How many orders were delivered in three days or more?

The following frequency distribution shows the distribution of delivery times (in days) for swimstuff.com customer orders during the last month. How many orders were delivered in less than one day?

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?

A small sample of computer operators shows monthly incomes of $1,950, $1,775, $2,060, $1,840, $1,795, $1,890, $1,925, and $1,810. What are these ungrouped numbers called?

Refer to the following distribution: What are the class limits for the class with the highest frequency?