## How many classes should one choose?

For most data, 6 to 15 classes are enough. Classes should have equal lengths and intervals. Intervals such as 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50, etc are desirable. The starting point for each class should be divisible by the interval, For example, in the class 15 – 20, the starting point, 15, is divisible by the interval, 5 …

## What is the 2K rule in statistics?

As a rule, the number cell intervals “K”, can be chosen to equal 2K less than the total number (n).

**How many classes should we choose how does one decide about the size of class interval class 11? **

There is no hard and fast rule about how many class we choose; but as a working rule the number of classes should lie between 5 and 15. You should note that the number classes will increase if you choose smaller class intervals, and decrease if your class intervals are large.

**How many classes should we have? **

There is no hard and fast rule about how many class we can choose, but as a working rule the number of classes should lie between 5 and 15. You should note that the number classes will increase if you choose smaller class intervals, and decrease if your class intervals are large.

### What is the upper limit of the class interval 40 50?

Answer: The upper limit of class interval 40-50 if 49. Because 50 is counted in the class interval 50-60. There are 9 classes in one class interval.

### What is the class mark of 40 to 60?

Complete step-by-step solution:=Class mark of 20-40 is 30.=Class mark of 40-60 is 50.

**What is the upper limit of class interval? **

5

**What does upper limit of normal mean? **

The highest value in a range of statistical characteristics which are meant to represent an accepted standard, nonpathological pattern for a particular laboratory result or quantitative parameter. (