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Chapter 2: Q. 4 (page 88)

What is the relationship between a frequency or relative frequency distribution of a quantitative data set and that of a qualitative data set?

Short Answer

Expert verified

The frequency distribution shows the frequency of all conceivable values.

The relative frequency distribution shows the relative frequency of all conceivable values.

Step by step solution

01

Concept introduction

The quantity of one variable in algebraic equations is typically reliant on the position of another. If the data tuple isn't declared precisely, the variable's beginning value reflects the default value.

02

Explanation

The couple of times a result occurred dividing by the amount of times the investigation is performed is called "relative frequency."

The classes in qualitative data are always the various single values that the variable can have. It's probable that we'll need to employ classes instead of single data for a quantitative data set.

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Most popular questions from this chapter

For quantitative data, we examined three types of grouping: single-value grouping, limit grouping, and cut point grouping. For each type of data given, decide which of these three grouping types is usually best, Explain your answers.

a. Continuous data displayed to one or more decimal places

b. Discrete data in which there are relatively few distinct observations

America's Melting Pot. The U.S. Census Bureau publishes data on the population of the United States by race and Hispanic origin in American Community Survey. From that document, we constructed the following bar chart. Note that people who are Hispanic may be of any race, and people in each race group may be either Hispanic or not Hispanic.

a. Explain why a break is shown in the first bar.

b. Why was the graph constructed with a broken bar?

c. Is this graph potentially misleading? Explain your answer.

In Exercises 2.20-2.25, we have presented some simple qualitative data sets for practicing the concepts. For each data set,

a. determine a frequency distribution.

b. obtain a relative-frequency distribution.

c. draw a pie chart.

d. Construct a bar chart.

We have drawn a smooth curve that represents a distribution,

a. Identify the shape of the distirbution with regard to modality.

b. Identify the shape of the distribution with regard to symmetry (or non symmetry)

c . If the distribution is unimodal and non symmetric, classify it as either right skewed or left skewed.

Class Levels. Earlier in this section, we considered the political party affiliations of the students in Professor Weiss's introductory statistics course. The class levels of those students are as follows, where Fr, So, Jr, and Sr denote freshman, sophomore, junior, and senior, respectively.
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