Question

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 (x¯)?

17.7
21.3
24
there is insufficient data to answer this question

Answer 1

@imqwerty can you help again?

Answer 2

@robtobey please help!!

Answer 3

you add all the numbers and divide it by 20

Answer 4

426/20 = 213/10 = 21.3

Answer 5

I got 21.3

Answer 6

Congratulations. 21.3 must be the correct answer.

Answer 7

thank you :)