# What is the class interval in statistics?

## What is the class interval in statistics?

The class interval is a term used in statistics when we are given a continuous series. Class means a group of numbers in which items are placed such as 0-10, 10-20, 20-30, etc. Class interval refers to the numerical width of any class in a particular distribution.

### How do you find the class interval on a calculator?

Example 1: Calculating Class Intervals The class interval is the difference between the upper class limit and the lower class limit. For example, the size of the class interval for the first class is 30 – 26 = 4. Similarly, the size of the class interval for the second class is 31 – 35 = 4.

What is the class interval length of 70 74?

Each class interval is represented by a lower limit (e.g., 95 for the top interval) and an upper limit (e.g., 99 for the top interval)….

Real Limits Apparent Limits Frequency
74.5-79.5 75-79 1
69.5-74.5 70-74 3
64.5-69.5 65-69 2
59.5-64.5 60-64 0

What is a class interval in a frequency table?

Class intervals The frequency of a class interval is the number of observations that occur in a particular predefined interval. So, for example, if 20 people aged 5 to 9 appear in our study’s data, the frequency for the 5–9 interval is 20.

## What is the class interval of 60 69?

### What is class interval math?

Definition. In maths class interval is defined as the difference between the upper class limit and the lower class limit. The size of the class into which a particular data is divided. E.g divisions on a histogram or bar graph.

How do you find the class interval in a frequency table?

Class Interval = Upper-Class limit – Lower class limit. In statistics, the data is arranged into different classes and the width of such class is called class interval.

What is the class mark of 10 to 20?

15
Class mark in a frequency distribution is the midpoint or the middle value of a given class. For example, the class mark of 10-20 is 15, as 15 is the mid-value that lies between 10 and 20.

## What is the formula of class limit?

In inclusive form, class limits are obtained by subtracting 0.5 from lower limitand adding 0.5 to the upper limit. Thus, class limits of 10 – 20 class interval in the inclusive form are 9.5 – 20.5. Class size: Difference between the true upper limit and true lower limit of a class interval is called the class size.

### What is the class size of 50 60?

In the interval 50-60, the lower limit is 50 and the upper limit is 60. We know that the class-mark is the average of limits of class-interval. Hence, the class mark of the interval 50-60 is 55.