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 5 2 4

Explanation:

Step1: Observe normal - like distribution

Estimate mean around 19.

Step2: Estimate spread

From graph, data spreads about 2 units on each side of mean. Rough - estimate variance as 4.

Answer:

4