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love history [14]
2 years ago
12

Please help

Mathematics
1 answer:
Black_prince [1.1K]2 years ago
8 0

The combined mean of the 14 people's index finger is: 12.75 cm.

<h3>How to Find the Combined Mean?</h3>

Combined mean = [(mean of first group × number of data of the first group) + (mean of second group × number of data of the second group)] ÷ (number of data of the first group + number of data of the second group).

Given the following:

Mean of first group = 7.8

Number of data of the first group = 7

Mean of second group = 17.7

Number of data of the second group = 7

Combined mean = [(7.8 × 7) + (17.7 × 7)] / (7 + 7)

Combined mean = 178.5 / 14

Combined mean = 12.75 cm.

Learn more about combined mean on:

brainly.com/question/16553735

#SPJ1

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