Question

find the mean from the following table.xi=5,6,7,8,4. fi=3,2,1,3,2​

Answer 1

Answer:

2.2

Step-by-step explanation:

$\begin{array}{c|c} \bf x_i & \bf f_i \\ \cline{1-2} 5 & 3 \\ 6 & 2 \\ 7 & 1 \\ 8 & 3 \\ 4 & 2 \end{array}$

We will multiply the xi by fi

5 × 3 = 15

6 × 2 = 12

7 × 1 = 7

8 × 3 = 24

4 × 2 = 8

We know that, Mean :-

$\dfrac{\sigma{f_{i}x_{i}}}{N}$, where N is Total of scores

Here, first we will find N i.e. Sum of xi

5 + 6 + 7 + 8 + 4

= 30

Now, we wil find $\sigma{f_{i}x_{i}}$

15 + 12 + 7 + 24 + 8

= 66

Now, Mean = $\dfrac{66}{30}$

= 2.2

∴ The mean of the data is 2.2

Answer 2

Answer:

Answer:

2.2

Step-by-step explanation:

\begin{gathered}\begin{array}{c|c} \bf x_i & \bf f_i \\ \cline{1-2} 5 & 3 \\ 6 & 2 \\ 7 & 1 \\ 8 & 3 \\ 4 & 2 \end{array}\end{gathered}xi\cline1−256784fi32132

We will multiply the xi by fi

5 × 3 = 15

6 × 2 = 12

7 × 1 = 7

8 × 3 = 24

4 × 2 = 8

We know that, Mean :-

\dfrac{\sigma{f_{i}x_{i}}}{N}Nσfixi , where N is Total of scores

Here, first we will find N i.e. Sum of xi

5 + 6 + 7 + 8 + 4

= 30

Now, we wil find \sigma{f_{i}x_{i}}σfixi

15 + 12 + 7 + 24 + 8

= 66

Now, Mean = \dfrac{66}{30}3066

= 2.2

∴ The mean of the data Answer:

2.2

Step-by-step explanation:

\begin{gathered}\begin{array}{c|c} \bf x_i & \bf f_i \\ \cline{1-2} 5 & 3 \\ 6 & 2 \\ 7 & 1 \\ 8 & 3 \\ 4 & 2 \end{array}\end{gathered}xi\cline1−256784fi32132

We will multiply the xi by fi

5 × 3 = 15

6 × 2 = 12

7 × 1 = 7

8 × 3 = 24

4 × 2 = 8

We know that, Mean :-

\dfrac{\sigma{f_{i}x_{i}}}{N}Nσfixi , where N is Total of scores

Here, first we will find N i.e. Sum of xi

5 + 6 + 7 + 8 + 4

= 30

Now, we wil find \sigma{f_{i}x_{i}}σfixi

15 + 12 + 7 + 24 + 8

= 66

Now, Mean = \dfrac{66}{30}3066

= 2.2

∴ The mean of the data is 2.2