Question

The mean length of 3 childrens' index finger is 9.9cm.

Answer 1

The mean length of the 6 people's index finger is 11.55

How to determine the mean length?

The given parameters are:

• Mean length of 3 children = 9.9 cm
• Mean length of 3 adults = 13.2 cm

The mean is calculated as:

$\bar x = \frac{\sum fx}{\sum f}$

So, we have:

$\bar x = \frac{3 * 9.9 + 3 * 13.2}{3 + 3}$

Evaluate

$\bar x = \frac{69.3}{6}$

Divide

$\bar x = 11.55$

Hence. the mean length of the 6 people's index finger is 11.55

Read more about mean at:

brainly.com/question/14532771

#SPJ1