Phy121
Your 'timer program' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Your General Comment **
** Describe what you see on your first 10 clicks **
A list of amount of time the program has been running vs the amount of time since the last click of the Click to Time Event button.
** #$&*Your TIMER data from 20 fast clicks **
1 116.418 116.418
2 116.5625 .1445313
3 116.832 .2695313
4 116.9609 .1289063
5 117.1328 .171875
6 117.2773 .1445313
7 117.4102 .1328125
8 117.5547 .1445313
9 117.7031 .1484375
10 117.8594 .15625
11 118.0195 .1601563
12 118.1641 .1445313
13 118.2734 .109375
14 118.4297 .15625
15 118.5977 .1679688
16 118.7461 .1484375
17 118.8906 .1445313
18 119.0273 .1367188
19 119.168 .140625
20 119.3281 .1601563
21 119.4844 .15625
22 119.6406 .15625
** #$&*Your average time interval for 20 time intervals **
5.96640784
&#The time intervals between your quick clicks were consistently less than .25 second. So the mean time interval you report, which is very much greater than any of the times between your quick clicks, cannot be correct. The mean time interval is longer than the shortest and shorter than the longest interval.
This discrepancy probably resulted from including in the averaging process one or more time intervals which do not represent times between quick clicks. For example, there is probably a long time interval at the very beginning of the data set, corresponding to the time between starting the program and your first click. If you included this interval, then your result is incorrect. &#
I used the programs File to Data button and saved the file as data. I then opened Excel and opened the data text file, told it to delimit by commas and calculated the average with Excel's =AVERAGE function.
** #$&*Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
0.109375, 1
0.1289063, 1
0.1328125, 1
0.1367188, 1
0.140625, 1
0.1445313, 5
0.1484375, 2
0.15625, 4
0.1601563, 2
0.1679688, 1
0.171875, 1
0.2695313, 1
116.418, 1
** #$&*Your general comment to this point **
** #$&*Why did you observe only certain time intervals? **
the timer program likely rounds up to certain significant numers.
** #$&*What did you see when you looked at the differences between time successive time intervals? **
the all end in 3 or 5, the timer program likely counts from .0003 to .0005
** #$&*Your time intervals for 7 complete breaths: **
5.632813
2.074219
2.058594
2.042969
2.183594
1.984375
2.402344
2.433594
2.339844
2.839844
** #$&*Your general comment to this point: **
** #$&*Why did you rarely, if ever, observe that same time interval twice? **
Breathing isn't regular so the clicks are coming in at completely different intervals rather than in intervals with the difference of less than .001 seconds.
** #$&*Do you think this program is accurate to .1 or .01 ... **
C; the timer doesn't seem to be able to accurately display .0001 second differences.
** #$&*Copy of a few lines of your spreadsheet from the TIMER program. **
event number clock time time interval
1 5.632813 5.632813
2 7.707031 2.074219
3 9.765625 2.058594
4 11.80859 2.042969
5 13.99219 2.183594
6 15.97656 1.984375
7 18.37891 2.402344
8 20.8125 2.433594
9 23.15234 2.339844
10 25.99219 2.839844
** **
45 minutes
** **
&#This looks good. See my notes. Let me know if you have any questions. &#