Answered

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The mean length of 4 childrens' index finger is 8.6cm. The mean length of 11 adults' index finger is 17.8cm. What is the mean length (rounded to 2 DP) of these 15 people's index finger?

Sagot :

The mean length of the 15 people's index finger is  15.35 cm.

What is mean?

Mean is the average of a set of numbers. It is determined by adding the numbers together and dividing it by the total number

Mean = sum of the numbers / total number

What is the mean of the 15 people's index finger?

Mean = [(4 x 8.6) + (11 x 17.8)] / 15

(34.4 + 195.8) / 15

230.2 / 15

= 15.35 cm

To learn more about mean, please check: https://brainly.com/question/25842202

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