Question

The following table shows the weight of 12 students
weight(kg) 67 70 72 73 75
no. of 4 3 2 2 1
students
What is the mean weight of the data?

Answer 1

Mean = sum of observations/no. of observations

= (4×67)+ (3×70) + (2×72) + (2×73)+75/12

=70.25

Answer:- 70.25

Hope it helps : )

Answer 2

The mean weight of the data is equal to '70.25' .

Step-by-step explanation:

The given table:

Weight(kg)                     67   70  72  73  75

Number of students(f)  4     3    2     2     1

To find, the mean weight of the data = ?

We know that,

Mean = $\dfrac{f_{1}x_{1}+f_{2}x_{2}+ f_{3}x_{3}+..... }{f_{1}+f_{2}+ f_{3}+..... }$

$=\dfrac{4\times 67+3\times70+2\times 72+2\times 73+1\times 75}{4+3+2+2+1}$

$=\dfrac{268+210+144+146+75}{12}$

$= \dfrac{843}{12}$

= 70.25

∴ The mean weight of the data = 70.25

Thus, the mean weight of the data is equal to 70.25 .