Question

PLEASE HURRY!!!!!!!!!

The data set represents the heights, in centimeters, of ten model bridges made for an engineering competition.

13 14 14 16 16 16 16 18 18 19



What is the mean?

Answer 1

Mean: 16.

Explanation:

—Mean—

13 14 14 16 16 16 16 18 18 19

Simply start by adding the numbers together.

13 + 14 + 14 + 16 + 16 + 16 + 16 + 18 + 18 + 19

= 160.

Then divide it by how many numbers there are. Which is 10.

160 divided by 10 = 16.

—MAD—

Subtract each number by the mean.

|13-16| + |14-16| + |14-16| + |16-16| + |16-16| +|16-16| + |16-16| + |18-16| + |18-16| + |19-16|

Negatives don’t matter, everything should be positive numbers.

3 + 2 + 2 + 0 + 0 + 0 + 0 + 2 + 2 + 3

= 16

16 divided by 16 (amount of numbers).

MAD = 1

–IQR—

Seperate both sides in half.

|13 14 14 16 16| |16 16 18 18 19|

Take the median of each group.

Group 1:

|13 14 (14) 16 16|

This one is 14.

Group 2:

|16 16 (18) 18 19|

This one is 18.

Now take (number from group 2) 18 and subtract by (number from group 1) 14.

18 - 14 = 4

IQR = 4.