Timeline for Calculating Mean and Standard Deviation From Frequency Chart
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 11, 2015 at 11:19 | vote | accept | Adam_G | ||
| Apr 11, 2015 at 4:11 | answer | added | Glen_b | timeline score: 3 | |
| Apr 11, 2015 at 4:10 | comment | added | Glen_b | This post has a little bit on the mean and this one discusses the standard deviation, but your problem is a little simpler than the issues in either of those. It may be worth dealing with the particular circumstances here in an answer. | |
| Apr 11, 2015 at 3:57 | comment | added | Glen_b | Well, it could change the mean by 10. If that's not a problem for you (and by the sound of it, it may not be), then there's no problem. In which case you probably needn't bother with Sheppard's corrections or anything either. | |
| Apr 11, 2015 at 3:26 | comment | added | Adam_G | The pauses go through the tens of thousands. That's why it won't be an issue. | |
| Apr 11, 2015 at 2:30 | comment | added | Glen_b | It will make a big difference to the mean if 10 represents "1-10" or "10-19" though (i.e. if it's the upper or lower bound of a category rather than the middle) | |
| Apr 11, 2015 at 2:08 | comment | added | Adam_G | I don't have access to the original data. The two values in the first row probably weren't exactly 10, but were rounded. There are thousands of values, so the fact that they were rounded to the nearest 10 really shouldn't make a huge difference. | |
| Apr 11, 2015 at 1:57 | comment | added | Glen_b |
Can you explain -- are these binned categories or are labels in the first column actual values (i.e. you have two exact '10' values for Pause)
|
|
| Apr 11, 2015 at 1:09 | history | asked | Adam_G | CC BY-SA 3.0 |