thepositiveclub Posted May 12, 2015 Report Share Posted May 12, 2015 If we're given a table such as the following, how do we calculate the standard deviation? Grade Number of students Cumulative frequency 1 9 9 2 25 34 3 35 69 4 40 109 5 11 120 Reply Link to post Share on other sites More sharing options...
King112 Posted May 12, 2015 Report Share Posted May 12, 2015 Well, I can tell you on a calculator. I use a TI-84 FYI. So go to "Stat", hit "Edit". On List 1, put gradeList 2 put Frequency. Hit "Stat" again, and use the arrow keys to move to "CALC". Hit Single variable dist. (Its the first option I think).Then, you get it all.Hope this helps. Reply Link to post Share on other sites More sharing options...
thepositiveclub Posted May 12, 2015 Author Report Share Posted May 12, 2015 Well, I can tell you on a calculator. I use a TI-84 FYI. So go to "Stat", hit "Edit". On List 1, put gradeList 2 put Frequency. Hit "Stat" again, and use the arrow keys to move to "CALC". Hit Single variable dist. (Its the first option I think).Then, you get it all.Hope this helps. Thank you! Do we enter the frequency or the cumulative frequency? Reply Link to post Share on other sites More sharing options...
King112 Posted May 12, 2015 Report Share Posted May 12, 2015 Frequency. Cumulative frequency doesn't come in here. 1 Reply Link to post Share on other sites More sharing options...
Baller97 Posted May 12, 2015 Report Share Posted May 12, 2015 ^Anybody knows how to do this with the ti-nspire cx? 1 Reply Link to post Share on other sites More sharing options...
dorianb Posted May 13, 2015 Report Share Posted May 13, 2015 (edited) ^Anybody knows how to do this with the ti-nspire cx?New Document > Add List > For A write x, and all the grades, for B write y and the respective number of students (frequency) > Click Menu > Statistics > Stat Calc > One Variable Statistics > Num of Lists: 1 > X1 List: 'x, Freq List: 'y, press OK Hence you will have your mean, s. dev, etc Edited May 13, 2015 by dorianb Reply Link to post Share on other sites More sharing options...
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