Answer:
11.3 to 1DP.
Explanation:
The mean = sum of the numbers / 12.
= 136/12
= 11.333
15.2
mean=average
to find the mean, add up all of the numbers and divide by the # of numbers that there are
4+5+6+12+12+12+14+16+22+23+28+28=182
182/12=15.2
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