Question

Calculate Arithmetic mean from the following data :
Height ( in inches ) 74 75 76 77 79 83 87 89 91
No. of students. 2 7 11 22 16 18 20 19 17 ​

Answer 1

Answer:

$82.87$.

Step-by-step explanation:

We have given the height (in inches) and the no. of students:

Height (x)                    74 75 76 77 79 83 87 89 91

No.of students(f)        2   7  11  22 16 18  20  19  17                               ∈f=132

multiple of x and f  148 525 836 1694 1264 1494 1740 1691 1547      ∈fx=10,939

Arithmetic Mean (X)=Multiple of x and f/Total no. of students

                                $=\frac{10939}{132} \\=82.87$

Thus, the airthmetic mean is $82.87$.