Answer
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Hint: In this question we just have to recall the formula of Sturges rule and then we will put the value of number of classes , the value of total frequency in the Sturges rule. The Sturges rule is used to determine the number of classes when the total number of observations is given.
Formula used: Sturges rule to find the number of classes is given by $K = 1 + 3.322\log \,N$ where $K$ is the number of classes and $N$ is the total frequency.
Complete step-by-step solution:
The number of classes given in the question is $n$ and total frequency is $N$
We know that Sturges rule is used to find the number of classes which is used in a histogram or frequency distribution.
From Sturges rule we can write.
$K = 1 + 3.322\log \,N$
Put the values of number of classes and total frequency in the above equation. Therefore, we will get
$n = 1 + 3.322\log \,N$
We can write the above equation as $n = 1 + 3.3\log \,N$ .
Hence, the correct option is (C).
Additional information: we will see in this example how to apply Sturges rule. Example: If the total number of observations are $1000$ then we can find the number of classes by the Sturges rule $K = 1 + 3.322\log \,N$
$
\Rightarrow K = 1 + 3.322\log 1000 \\
\Rightarrow K = 1 + 3.322\left( 3 \right) = 10.966
$
Note: The important thing in this question is the rule given by Sturges which we have to remember. The Sturges rule is the function of $\log $ so while solving the question related to Sturges rule just make sure that we are comfortable with the properties of $\log $.
Formula used: Sturges rule to find the number of classes is given by $K = 1 + 3.322\log \,N$ where $K$ is the number of classes and $N$ is the total frequency.
Complete step-by-step solution:
The number of classes given in the question is $n$ and total frequency is $N$
We know that Sturges rule is used to find the number of classes which is used in a histogram or frequency distribution.
From Sturges rule we can write.
$K = 1 + 3.322\log \,N$
Put the values of number of classes and total frequency in the above equation. Therefore, we will get
$n = 1 + 3.322\log \,N$
We can write the above equation as $n = 1 + 3.3\log \,N$ .
Hence, the correct option is (C).
Additional information: we will see in this example how to apply Sturges rule. Example: If the total number of observations are $1000$ then we can find the number of classes by the Sturges rule $K = 1 + 3.322\log \,N$
$
\Rightarrow K = 1 + 3.322\log 1000 \\
\Rightarrow K = 1 + 3.322\left( 3 \right) = 10.966
$
Note: The important thing in this question is the rule given by Sturges which we have to remember. The Sturges rule is the function of $\log $ so while solving the question related to Sturges rule just make sure that we are comfortable with the properties of $\log $.
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