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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

Explain the difference between

a. frequency and relative frequency.

b. percentage and relative frequency.

Days to Maturity for Short-Term Investments. Refer to the days-to-maturity data in Table 2.6 on page 53 . Note that there are 40observations, the smallest and largest of which are 36and 99, respectively. Apply the preceding procedure to choose classes for limit grouping. Use approximately seven classes. Note: If in Step 2 you decide on 10 for the class width and in Step 3 you choose 30 for the lower limit of the first class, then you will get the same classes as used in Example 2.13; otherwise, you will get different classes (which is fine).

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.

Exam Scores. The exam scores for the students in an introductory statistics class are as follows.

a. Group these exam scores, using the classes 30-39,40-49,50-59,60-69,70-79,80-89, and 90-100.

b. What are the widths of the classes?

c. If you wanted all the classes to have the same width, what classes would you use?

As mentioned, for relative-frequency polygons, we label the horizontal axis with class marks in limit grouping and class midpoints in cut point grouping. How do you think the horizontal axis is labeled in single-value grouping.

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