Mean 6.9 6.3 6.3 6.3 6.2 6.7 7.1 6.2 6.8 6.2

The mean of the values given is 6.5.

The mean in mathematics is found by finding the sum of all the values (adding the all together), then dividing the sum by the number of values there are.

If you add all the values given in the set above, you will get 65. There are 10 values, so you take 65 and divide it by 10. Thus getting 6.5 as your answer.

I hope this helps!

B) -3/2

Step-by-step explanation:

If [x/2]=0 then x/2 is a number such that the least integer greater than or equal to x/2 is 0. We can rewrite this as the inequality x/2≤0. Then, the value of x in C, D and E is wrong because they are positive numbers, then x/2 would be a positive number which contradicts this inequality.

Now, 0 is the least integer that satisfies this inequality, therefore we cannot have that x/2≤-1 since -1 is an integer and -1<0. Then x/2>-1. This discards A as wrong, because for x=-2, x/2=-1, contrary to x/2>-1.

Thus B is the right answer. To verify, if x=-3/2, then x/2=-3/4 and we have that -1<-3/4≤0 as required.