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

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 three days?

Refer to the following breakdown of responses to a survey of "Are you concerned about being tracked while connected to the Internet?" What is the class interval for the preceding frequency table?

If the number of observations is 124, calculate the suggested number of classes using the "2 to the k rule."

A student was studying the political party preferences of a university's student population. The survey instrument asked students to identify themselves as a Democrat or a Republican. This question is flawed because:

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

The relative frequency for a class represents the ________________.

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?

Refer to the following breakdown of responses to a survey of "How confident are you that you saved enough to retire?" What type of chart should be used to describe the frequency table?

Refer to the following breakdown of responses to a survey of "How confident are you that you saved enough to retire?" What type of chart should be used to show relative class frequencies?

The monthly salaries of a sample of 100 employees were rounded to the nearest $10. They ranged from a low of $1,040 to a high of $1,720. If we want to condense the data into seven classes, what is the most convenient class interval?

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: Why is the table NOT a frequency distribution?

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

To calculate a relative frequency, a class frequency is divided by ___________.

For a relative frequency distribution, relative frequency is computed as _____________.

Refer to the following breakdown of responses to a survey of room cleanliness in a hotel. Draw a bar graph that illustrates the preceding frequency table.

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 are the class limits for the fourth class?

For the following distribution of heights, what are the limits for the class with the greatest frequency?

Refer to the following distribution of commissions: To plot a cumulative frequency distribution, the first coordinate 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?

In frequency distributions, classes are mutually exclusive if each individual, object, or measurement is included in only one category.