PHY 201
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 **
I see three columns of numbers.I assume one is for the number of times you click the button and the others are for the times.
** #$&*Your TIMER data from 20 fast clicks **
1 25.88281 25.88281
2 26.05469 .171875
3 26.25 .1953125
4 26.40625 .15625
5 26.60938 .203125
6 26.78125 .171875
7 26.97656 .1953125
8 27.14844 .171875
9 27.33594 .1875
10 27.52344 .1875
11 27.6875 .1640625
12 27.88281 .1953125
13 28.04688 .1640625
14 28.22656 .1796875
15 28.40625 .1796875
16 28.57813 .171875
17 28.73438 .15625
18 28.92188 .1875
19 29.125 .203125
20 29.27344 .1484375
** #$&*Your average time interval for 20 time intervals **
1.46367
01-26-2010 23:25:14
Coded lines searched and replaced
PHY 201
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 **
I see three columns of numbers.I assume one is for the number of times you click the button and the others are for the times.
** #$&*Your TIMER data from 20 fast clicks **
1 25.88281 25.88281
2 26.05469 .171875
3 26.25 .1953125
4 26.40625 .15625
5 26.60938 .203125
6 26.78125 .171875
7 26.97656 .1953125
8 27.14844 .171875
9 27.33594 .1875
10 27.52344 .1875
11 27.6875 .1640625
12 27.88281 .1953125
13 28.04688 .1640625
14 28.22656 .1796875
15 28.40625 .1796875
16 28.57813 .171875
17 28.73438 .15625
18 28.92188 .1875
19 29.125 .203125
20 29.27344 .1484375
** #$&*Your average time interval for 20 time intervals **
1.46367
&#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. &#
Added numbers and divided by 20
** #$&*Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
.1484375, 1
.15625, 2
.1640625, 2
.171875, 4
.1796875, 2
.1875, 3
.1953125, 3
.203125, 2
** #$&*Your general comment to this point **
** #$&*Why did you observe only certain time intervals? **
No I don't think the program is useless, for most applications tenths of a second is going to be accurate enough.
** #$&*What did you see when you looked at the differences between time successive time intervals? **
It tells me that the timer program is very accurate and it can measure very small time changes
** #$&*Your time intervals for 7 complete breaths: **
3.78125
4.734375
7.328125
8.09375
8.117188
7.085938
7.070313
** #$&*Your general comment to this point: **
** #$&*Why did you rarely, if ever, observe that same time interval twice? **
You are measuring longer time intervals.
** #$&*Do you think this program is accurate to .1 or .01 ... **
b. .01 seconds
I think this because the accuracy will depend on the user and how quickly the user can respond.
** #$&*Copy of a few lines of your spreadsheet from the TIMER program. **
breaths
event number clock time time interval
1 1840.109 1840.109
2 1843.891 3.78125
3 1848.625 4.734375
4 1855.953 7.328125
5 1864.047 8.09375
** **
45 min
** **
&#Good responses. See my notes and let me know if you have questions. &#