Question

What is the first quartile (Q1) of the data set?

41, 33, 52, 67, 44, 38, 55, 62

A.
33

B.
39.5

C.
58.5

D.
67

Answer 1

@iGreen

Answer 2

First we arrange from least to greatest:

33, 38, 41, 44, 52, 55, 62, 67

Now we split it in half and look at the first half:

33, 38, 41, 44

We take the two numbers in the middle, 38 and 41 and find the mean.

38 + 41 = ?

Answer 3

79

Answer 4

@iGreen

Answer 5

Yes, now divide by 2. 79 / 2 = ?

Answer 6

what 2.79 and 2 come from?

Answer 7

We are finding the mean.

And it's not 2.79, it's just 79.

79 came from adding 38 + 41

And finding the mean is adding the numbers up and dividing by how many numbers there are.

There are 2 numbers, so we divide by 2.

79 / 2 = ?

Answer 8

39.5

Answer 9

Yep, that's our answer.