Question

21.

Two sets of values are given below.



set 1:



37

,

39

,

35

,

41

,

38



set 2:



41

,

39

,

34

,

39

,

37


Which of the following conclusions can be drawn about the means of these two sets?
A. The mean for set 2 is equal to the mean for set 1.
B. The mean for set 2 is lower than the mean for set 1.
C. The mean for set 2 is higher than the mean for set 1.
D. The medians of both sets are equal to the means of both sets.

Answer 1

@Noemi95

Answer 2

Well, to find the means you add all the numbers given (each set respectively) and then divide by the number of numbers there is. And The median of a set of numbers is the value for which half the numbers are larger and half are smaller.

Answer 3

so let's see for the first set, if we add all the numbers we get 190 then we divide by 5 (because there is 5 #'rs in set 1 so we get 190/5=38
and for set 2 we get 190 also, so the mean is 38 also

Answer 4

so, I would say B is the answer.

Answer 5

meant A!

Answer 6

can you also look at these two ?

Answer 7

yeah, let me take a look

Answer 8

Kay !

Answer 9

Let's see, for a 30-60-90 right triangle, the legs are in ratio 1:sqrt3:2, where 2 is the hyp, 1 is short leg, and sqrt3 is long leg.
So for 19, hyp=28, then short leg=14 [answer is A]

Answer 10

thank you

Answer 11

for 20 it's D

Answer 12

want to know why/how?

Answer 13

yes please

Answer 14

to find a shaded section of a circle we use the formula:
(degrees of central angle)/360*(pi)*r^2
We know the area of the whole circle which is 169(pi)=530.66,
BUT we don't know what the radius is. To find the radius of the circle we use formula:
(area/pi) and then find sqrt of it. So, 530.66/3.14=169, and the sqrt of 169=13
Now we have all the info we need to find the area of the section.
so it's, 120/360*(pi=3.14)*13^2
solve it and we get 176.89 ( answer D)