Questions and Answers
A frequency distribution lists the ___ of occurrences of each category of data, while a relative frequency distribution lists the ___ of occurrences of each category of data.
number, proportion
____ are classes by which data are grouped.
classes
The _____ is the smallest value within the class and the ___ is the largest value within the class.
lower class limit, upper class limit
The ____ is the difference between consecutive lower class limits.
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The _____ ______ lists each category of data and the number of occurrences for each category.
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The ____ ____ relative frequency is the proportion (or percent) of observations within a category and is found using the formula Frequency divided by sum of all frequencies.
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A ___ ____ ____ lists each category of data together with the relative frequency.
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A __ __ is constructed by labeling each category of data on either horizontal or vertical axis and the frequency or relative frequency of the category on the other axis.
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What is a Pareto chart?
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What is a pie chart?
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A ___ is constructed by drawing rectangles of each class of data. The height of each rectangle is the frequency or relative frequency of the class. The width of each rectangle is the same and the rectangles touch each other.
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A ____ ____ ___ is obtained by plotting the time in which a variable is measured on the horizontal axis and the corresponding value of the variable on the vertical axis.
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Study Notes
Frequency Distributions
- A frequency distribution lists the number of occurrences for each data category.
- A relative frequency distribution shows the proportion of occurrences for each data category.
Classes and Limits
- Classes serve as the groupings for data.
- The lower class limit is the smallest value in a class, while the upper class limit is the largest value.
Class Widths
- Class widths represent the difference between consecutive lower class limits.
Types of Distributions
- A frequency distribution details each data category alongside its occurrence count.
- Relative frequency indicates the proportion (or percentage) of observations in a category, calculated by dividing the frequency by the total frequency count.
Graphical Representations
- A relative frequency distribution presents each data category with its corresponding relative frequency.
- A bar graph displays categories on one axis and their frequency or relative frequency on the other.
Specific Graph Types
- A Pareto chart is a type of bar graph arranged in descending order of frequency.
- A pie chart visually represents data as sectors of a circle, with each sector indicating a category.
- A histogram is constructed with rectangles representing each class of data, where the rectangle height corresponds to frequency or relative frequency and the width remains consistent, touching each other.
Time Series Analysis
- A time series plot features time measured on the horizontal axis and the corresponding value of the variable on the vertical axis, facilitating the analysis of trends over time.
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Description
Test your knowledge of key concepts from Statistics Chapter 2 with these flashcards. Focus on understanding frequency distributions, classes, and values within data categories. Perfect for students looking to reinforce their learning in statistics.
