Calculate the mean for the following distribution:

x : 5 6 7 8 9

f : 4 8 14 11 3

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Solution

Calculation of Mean

x_i f_i f_i x_i

5 4 20

6 8 48

7 14 98

8 11 88

9 3 27

Total $\sum_{}^{} f_{i} =$ 40 $\sum_{}^{} f_{i} x_{i} =$ 281

∴ Mean = $\frac{\sum_{}^{} f_{i} x_{i}}{\sum_{}^{} f_{i}} = \frac{281}{40} = 7.025$ .

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Similar questions

$x$ :	$5$	$6$	$7$	$8$	$9$
$f$ :	$4$	$8$	$14$	$11$	$3$

Calculate Mean and standard deviation for the following distribution

X	$5$	$15$	$25$	$35$	$45$
f	$5$	$8$	$15$	$16$	$6$

x:	5	6	7	8	9
f:	4	8	14	11	3

Find the missing frequency p for the following frequency distribution whose mean is $28.25$ .

X	3	5	6	7	8
f	2	4	3	8	10

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