Question

the sum of N observation is 360 and their mean is 42.then the value of N is​

Answer 1

Answer:

8.57

Step-by-step explanation:

mean=total observations÷total N

so N= 360/42

Answer 2

The value of N = 8.57    

Given:

The sum of N observation is 360

And their mean is 42.

To find:

The value of N

Solution:

As we know the formula for mean of number of observations is given by

Mean = Sum of observations ÷ Number of observations

From given data Sum of  N observations = 360

Mean of N observations = 42

Here N = number of observations

Substitute the given values in the mean formula

⇒ 42 =  360 ÷ N

⇒ $42 = \frac{360}{N}$

⇒  N = 360 / 42 =  8.57

The value of N = 8.57    

 

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