Question

50 POINTS FOR THIS QUESTION!!!

The graph shows the distribution of hand lengths, in centimeters, of the members of an orchestra.

What is the variance of the data?

1
2
4
5

Answer 1

The answer is 4... i just had this.

Answer 2

Answer:

Step-by-step explanation:

Given is the graph bell shaped.

We have to find the variance of the data

We see that the graph looks like a normal distribution curve symmetrical about x=19

Hence mean =19

Since we know maximum area covered within 3 std deviations on either side of mean, we can calculate 6 sigma value from the graph

Extreme left x value = 14 and right = 24

Hence 6 times std dev =24-14 =10

So std deviation = 10/6 =5/3

Variance = 25/9