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Statistics Class Intervals and Histograms

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Statistics Class Intervals and Histograms

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Questions and Answers

What is the purpose of a histogram?

To display gaps between bars
To summarize continuous data (correct)
To summarize discrete data
To use qualitative data

How is a histogram different from a vertical bar graph?

It displays gaps between bars
It uses only qualitative data
It shows no gaps between the bars (correct)
It is not used for summarizing data

What does the relative frequency in a frequency distribution table represent?

The total frequency of all classes
The cumulative frequency
The number of class boundaries
The percentage of each class relative to the total (correct)

In the context of frequency distribution, what do class boundaries represent?

The range of values within a class (B) Signup and view all the answers

What is the formula for calculating cumulative frequency in a frequency distribution table?

$N = \sum f$ (A) Signup and view all the answers

What is a statistical question?

A question that anticipates many different responses (C) Signup and view all the answers

What is meant by variability in a set of data?

The spread or dispersion of data values in the set (C) Signup and view all the answers

Which method of presenting data is considered the simplest?

Textual Method (B) Signup and view all the answers

What does a frequency distribution table help in showing?

The distribution of data values into classes or categories (C) Signup and view all the answers

In a frequency distribution table, what are class limits?

The upper and lower boundaries of each class interval (D) Signup and view all the answers

What do class boundaries represent in a frequency distribution table?

They separate adjacent classes without gaps or overlaps (B) Signup and view all the answers

What is the class mark of a class with lower limit 10 and upper limit 20?

15 (D) Signup and view all the answers

In a Frequency Distribution Table (FDT), what does the term 'class width or size' refer to?

The distance between the lower limit of one class and the lower limit of the next class (C) Signup and view all the answers

What does relative frequency represent in a Frequency Distribution Table (FDT)?

The ratio of the class frequency to the total number of observations (A) Signup and view all the answers

Which term refers to the numbers midway between the upper limit of one class and the lower limit of the next class?

Class boundaries (D) Signup and view all the answers

What does 'Less than cumulative frequency' represent in a Frequency Distribution Table?

Number of observations less than or equal to the upper limit of the class interval (D) Signup and view all the answers

In a Frequency Distribution Table, what does 'Greater than cumulative frequency' represent?

Number of observations greater than or equal to the upper limit of the class interval (B) Signup and view all the answers