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

Refer to the following breakdown of responses to a survey of room service in a hotel: What is the class interval for this frequency table?

For a relative frequency distribution,relative frequency is computed as

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?

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

When data are collected using a quantitative,ratio variable,what is true about a frequency distribution that summarizes the data?

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?

A frequency distribution is a grouping of quantitative data into overlapping classes showing the number of observations in each class.

Refer to the following distribution: What is the class midpoint for the $45 up to $55 class?

Refer to the following breakdown of responses to a survey of "Are you concerned about being tracked while connected to the Internet?" What type of chart should be used to show relative class frequencies?

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?

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

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

In a bar chart,the horizontal axis is usually labeled with the values of a qualitative variable.

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

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 distribution of commissions: To plot a cumulative frequency distribution,the first coordinate would be

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

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 pie chart shows the

In constructing a frequency distribution,the approximate class interval is computed as