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In an attempt to be environmentally friendly, the city council deci...
Mathematics, 23.03.2020 19:29 HealTheWorld
Select the correct answer.
In an attempt to be environmentally friendly, the city council decides that there must be at least 18 trees on each block in the city. A sample of 20 blocks was randomly surveyed, with these results (number of trees per block): 24, 17, 7, 20, 28, 27, 10, 21, 30, 8, 30, 27, 22, 27, 27, 13, 27, 20, 24, 17. What is the sample mean number of trees per block ?
A.
17.7
B.
21.3
C.
24
D.
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