The mean length of the 6 people's index finger is 11.55
The given parameters are:
The mean is calculated as:
[tex]\bar x = \frac{\sum fx}{\sum f}[/tex]
So, we have:
[tex]\bar x = \frac{3 * 9.9 + 3 * 13.2}{3 + 3}[/tex]
Evaluate
[tex]\bar x = \frac{69.3}{6}[/tex]
Divide
[tex]\bar x = 11.55[/tex]
Hence. the mean length of the 6 people's index finger is 11.55
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