Amy S.

asked • 09/18/16

REALLY REALLY NEED URGENT HELP

Need help for this

A group of working adults was surveyed to find out how well they sleep on weekend nights. The pie chart below shows, correct to the nearest hour, the hours of sleep of these adults on a particular weekend night.

(Content of the pie chart)

6h: (2y+10)º
7h: (4y-20)º
8h: (3y+35)º
9h: (y+15)º

Find
a) the value of y
b) the modal number of hours of sleep
c) the median number of hours of sleep
d) the mean number of hours of sleep

Please show the full working and answers, thanks!

1 Expert Answer

By:

Mark M. answered • 09/18/16

Tutor
5.0 (278)

Mathematics Teacher - NCLB Highly Qualified

See tutors like this
See tutors like this
(2y+10)º + (4y-20)º + (3y+35)º + (y+15)º = 360°
 
Now you can solve for y.
 
What is the meaning of "mode," "median," and "mean?"
Upvote • 0 Downvote
More
Report

Amy S.

I managed to solve for y. I just need help for parts c and d
 
mode- data which has the highest frequency
median- data that is in the middle of all the data
mean- average of all the data 
Report

09/19/16

Mark M.

Correct definitions!
What are the numbers for the four parts?
e.g., 2y + 10 = ?
When you have the four numbers you can answer c and d.
Report

09/19/16

Amy S.

Is the mean 7.41 hours?
Report

09/20/16

Mark M.

If you added the four numbers and divided the sum by four? If you did you are correct.
Report

09/20/16

Amy S.

So my answer is correct right? Yup, I did! Thanks!
Report

09/21/16

Mark M.

Welcome! Way to learn.
Report

09/21/16

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.