Question

These are the heights of Natasha and her four friends:
5 feet, 2 inches; 5 feet, 3 inches; 5 feet, 7 inches; 5 feet, 9 inches; 6 feet, 0 inches

In which situation would the mean of the heights go up the most?

a. You add 2 friends that are 5 feet, 8 inches.

b. You add 1 friend that is 6 feet, 5 inches and 1 friend that is 5 feet, 3 inches.

c. You add 1 friend that is 5 feet, 10 inches.

d. You add 4 friends that are 5 feet, 9 inches.

Answer 1

Please help! Will give medal and fan and fan testimonial!

Answer 2

What is the current mean?

Answer 3

I don't get the question.

Answer 4

I would convert the heights to inches then find the mean of that.

Answer 5

Oh ok thx

Answer 6

Start by converting the feet to inches. Right now the mean is:
(62+63+67+69+72)/5

Answer 7

hang on.

Answer 8

The mean is 67.

Answer 9

The heights are, in inches, 62, 63, 67, 69, 72.
The total height is 333 in. The mean height is 66.6 in.
A. 333 in. + 68 in. + 68 in. = 469 in. Mean: 67 in.
B. 333 in. + 77 in. + 63 in. = 473 in. Mean: 67.57 in.
C. 333 in. + 70 in. = 403 in. Mean: 67.17 in.
D. 333 in. + 4 * 69 in. = 609 in. Mean: 67.67 in.

Answer 10

Correct. Now can you apply letter A to this scenario?

Answer 11

So your answer is D

Answer 12

Yeah, hang on.

Answer 13

I need help, not the answer. @cutegirl1000

Answer 14

as I said before
The heights are, in inches, 62, 63, 67, 69, 72.
The total height is 333 in. The mean height is 66.6 in.
A. 333 in. + 68 in. + 68 in. = 469 in. Mean: 67 in.
B. 333 in. + 77 in. + 63 in. = 473 in. Mean: 67.57 in.
C. 333 in. + 70 in. = 403 in. Mean: 67.17 in.
D. 333 in. + 4 * 69 in. = 609 in. Mean: 67.67 in.

Answer 15

Ik, but I need to do it myself.

Answer 16

then why are you asking others for help?

Answer 17

/facepalm
So she can learn how to do it so she will be able to do it independently in the future. It's called learning I think..

Answer 18

Exactly. I don't just want the answer, I want to learn how to do it so I don't have to ask again.

Answer 19

67.28?

Answer 20

Sorry dc. One sec

Answer 21

Our original equation is (62+63+67+69+72)/5=mean=66.67
We're adding two more friends and 68 inches for each friend.

Now our equation is (62+63+67+69+72+68+68)/7=mean=67.00

Answer 22

Oh, ok.

Answer 23

For the next one, we're adding two friends. One is 78 inches tall, and another is 63.
Now our equation is (62+63+67+69+72+78+63)/7=mean=67.71

Can you do C?

Answer 24

How are you doing? Do you think you've got the hang of it?