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A Little Help With Standard Deviation - Please  
User currently offlineVafi88 From United States of America, joined Apr 2001, 3116 posts, RR: 15
Posted (11 years 7 months 5 days 14 hours ago) and read 2258 times:

Hey guys. I've been procrastinating a little bit, and with the test tomorrow, I'm having to write out the whole equation (which takes about 10 minutes and is about 3 miles long). I need to know how to plug it into my TI-83 so I can actually do all of the problems on my test tomorrow. I know how to get to the standard deviation. I get to:

2nd - Stat, then scroll to MATH, and then go down to StdDev(

I don't know what to plug into the parenthasies from StdDEV(

If any of you can help, it'd greatly be appreciated.

I'd like to elect a president that has a Higher IQ than a retarted ant.
4 replies: All unread, jump to last
User currently offlineJhooper From United States of America, joined Dec 2001, 6206 posts, RR: 11
Reply 1, posted (11 years 7 months 5 days 11 hours ago) and read 2240 times:

Well, I can't remember how to work the TI-83, but if all else fails, Standard Deviation isn't all that hard to do on pencil and paper, assuming you don't have lots of weird numbers  Big grin

Last year 1,944 New Yorkers saw something and said something.
User currently offline7574EVER From United States of America, joined Jan 2004, 478 posts, RR: 4
Reply 2, posted (11 years 7 months 5 days 11 hours ago) and read 2238 times:

Here's the way my professor taught us to do it. Remember the acronym..

The first letter of each word is the next step that needs to be done.

1.)Mean - figure out the mean (average) of all the numbers being used
2.)Dogs - figure out the deviation of all the numbers being used
3.)Send - square each of the deviations
4.)Meannies - figure out the mean of all the new numbers from step three.
5.)Running- then get the square root of the answer to step four.

After step five you should have the standard deviation.

I know you wanted to know how to put in into the TI-83, but since I can't help you there hopfully this can make it easier if you end up doing it on paper

Right rudder....Right rudder...Come on, more right rudder....Right rudder......Aw forget it, I quit!!
User currently offlineL-188 From United States of America, joined Jul 1999, 30173 posts, RR: 58
Reply 3, posted (11 years 7 months 5 days 11 hours ago) and read 2236 times:

Sorry can't help.

My graphing calculator is a Casio.

User currently offlineTYSGoVols From United States of America, joined Jan 2004, 634 posts, RR: 15
Reply 4, posted (11 years 7 months 4 days 21 hours ago) and read 2217 times:

If you can figure out teh variance then SD is not that hard

V squared = SD

SD suqare rooted = V

Not sure of any huge formulas though.

<>< Garen

Rocky Top You'll Always be home sweet home to me, Good ole' Rocky Top WOOOOO
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