Question

what is the mean of this data 76,68,84,69,78​

Answer 1

Solution:

Mean = (Sum of observations) / (number of observations)

• Here, the observations which are given are 76, 68, 84, 69, 78.

• We need to find the mean (arithmetic mean) or the average of the given data.​

Let's find sum of given observations (data)

• i.e. 76 + 68 + 84 + 69 + 78

We get, (the sum) 76 + 68 + 84 + 69 + 78 = 375

The number of observations given is '5'.

• As mean is (Sum of observations) / (number of observations)
• i.e. $\frac{sum of observations}{no:of observations}$

→ Mean = 375/5 = 75 (cancelling by 5 table)

Answer:

The mean of this data 76, 68, 84, 69, 78 is 75.

Note:

• We use many methods to find the arithmetic mean. But we used one of the methods to find mean

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Answer 2

Answer:

We will get the mean value of 76,68,84,69,78 is 75.

Step-by-step explanation:

• As per the question we have to evaluate the given data.

        Given data:- 76,68,84,69,78.

        To find:- Mean value of 76,68,84,69,78.

        Solution:-

• We know that mean is an arithmetic average of all numbers.

• It is the sum of all numbers divided by the total number of observations.

• The formula of the mean is,

           $mean =\frac{\text { Sum of all number }}{\text { Total number of observation }}$

          Therefore we will get,

          $\begin{array}{l}\text { mean }=\frac{76+68+84+69+78}{5} \\\text { mean }=\frac{375}{5} \\\text { mean }=75\end{array}$