Question

hi there

A survey was conducted by a group of students as a part of their environment awareness programmed, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house.

Answer 1

Answer:

8.1

Step-by-step explanation:

Refer to attachment for Table

We know that Mean of a Grouped Data can be found by using the formula:

$\text{Mean =} \dfrac{ \sum fx}{ \sum f}$

Here Sum of all fx = 162 and Sum of all frequencies ( f ) = 20

$\text{Hence Mean = } \dfrac{162}{20} = 8.1$

Hence the mean of the given data is 8.1.

Hope it helped !!

Answer 2

Solution:

In order to find the mean value, we will use direct method because the numerical value of fi and xi are small.

Find the midpoint of the given interval using the formula.

Midpoint (xi) = (upper limit + lower limit)/2