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Mathematics 14 Online
OpenStudy (anonymous):

Can some one help me with these two math problems? http://ocas.pearsonschool.com/ph/cd/0-13-365946-8/?token=53616c7465645f5f81d8086b402612535c05bb36548c352efd4d42aa1f0bb0bdac910c59b0106743211d5f73e68757a01aa7c21cd8986203d225aa23afe42a72ef07f866009a4e4b Page 773

OpenStudy (anonymous):

the page is blank

OpenStudy (anonymous):

And then I see that you delete you comment.... WOW

jimthompson5910 (jim_thompson5910):

any ideas where to start?

OpenStudy (anonymous):

No not really...

jimthompson5910 (jim_thompson5910):

do you see the table off to the right?

OpenStudy (anonymous):

yeahh

jimthompson5910 (jim_thompson5910):

ok, in part a) they want you to make a histogram of everyone who has a video game system

jimthompson5910 (jim_thompson5910):

So your first task is to add the values in the first two rows

jimthompson5910 (jim_thompson5910):

so for instance, in the 13 yr old group, there are 12 who have home video games and 5 who have portable video games, so there are 12+5 = 17 thirteen yr olds who have either one

jimthompson5910 (jim_thompson5910):

do this for the other ages

jimthompson5910 (jim_thompson5910):

let me know what you get

OpenStudy (anonymous):

How would i make the graph?

jimthompson5910 (jim_thompson5910):

Draw a horizontal line. Then write the ages under the line and give the numbers a bit of space.

jimthompson5910 (jim_thompson5910):

Then draw a line that is at a right angle to this horizontal line and place it off to the very far left

jimthompson5910 (jim_thompson5910):

This will mark the frequencies. For each age, you'll be drawing a rectangle where the height represents how frequent you see that age

jimthompson5910 (jim_thompson5910):

For example, we count 17 thirteen yr olds, so we have something like this |dw:1339476282093:dw|

jimthompson5910 (jim_thompson5910):

I couldn't squeeze it in, but there should be a 17 off to the left of that vertical line that's on the very left

OpenStudy (anonymous):

Okaaay i have part a so now what for part b?

jimthompson5910 (jim_thompson5910):

well keep in mind that you do this for each age

OpenStudy (anonymous):

Thats not what my teacher said....

jimthompson5910 (jim_thompson5910):

oh, hmm guess the text is off

OpenStudy (anonymous):

Well I dont know thats why im so confused

jimthompson5910 (jim_thompson5910):

did you see how I got that drawing above?

OpenStudy (anonymous):

Yeah okay I got it now, so what do i do for part b?

jimthompson5910 (jim_thompson5910):

you combine the ages any way you want to, so instead of having individual bars for each age, you have bars for 13-14, 15-16, 17-18 for example

jimthompson5910 (jim_thompson5910):

that frees up some room

OpenStudy (anonymous):

Okay what about D?

jimthompson5910 (jim_thompson5910):

hmm I'd say a histogram is very useful for displaying lots of data since you can figure out the mean, median, and mode (and the basic shape of how everything is spread out)

OpenStudy (anonymous):

Okay now for E?

jimthompson5910 (jim_thompson5910):

Step 1) Add up all the numbers in the table (don't add the ages 13 through 18; just the numbers below that row) What do you get when you add up these numbers?

OpenStudy (anonymous):

All of them Home Portable and non gamers?

jimthompson5910 (jim_thompson5910):

yes all three rows

OpenStudy (anonymous):

250

jimthompson5910 (jim_thompson5910):

good, I'm getting that too

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