Phy 121
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 the time from when i pushed it the first time and the change from the first to the next.
** Your TIMER data from 20 fast clicks **
1 112.2734 112.2734
2 112.4141 .140625
3 112.5625 .1484375
4 112.6836 .1210938
5 112.8359 .1523438
6 112.9648 .1289063
7 113.0898 .125
8 113.2266 .1367188
9 113.3828 .15625
10 113.5352 .1523438
11 113.6719 .1367188
12 113.8242 .1523438
13 113.9766 .1523438
14 114.1172 .140625
15 114.2773 .1601563
16 114.4297 .1523438
17 114.582 .1523438
18 114.7383 .15625
19 114.9102 .171875
20 115.0898 .1796875
** Your average time interval for 20 time intervals **
113.62929
I added all the numbers then divided by 20.
you averaged clock times, not time intervals
The average time interval is probably about .15 second.
You have only 19 intervals corresponding to quick clicks. The 112 seconds in line 1 is not an interval which corresponds to an interval between quick clicks.
Note that the average interval could have been calculated either by adding up the 19 quick-click intervals and dividing by 19, or by subtracting the first clock time from the last and dividing by 19.
** Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
.1210938, 1
.125, 1
.1289063, 1
.1367188, 2
.140625, 2
.1484375, 1
.1523438, 6
.15625, 2
.1601563, 1
.171875, 1
.1796875, 1
** Your general comment to this point **
** Why did you observe only certain time intervals? **
The timer program may have a delay or something to that effect, or you keys could possibly stick.
** What did you see when you looked at the differences between time successive time intervals? **
It uses common intervals between the others.
** Your time intervals for 7 complete breaths: **
5.742188
6.605469
6.003906
4.773438
5.125
5.171875
5.316406
4.925781
4.941406
** Your general comment to this point: **
** Why did you rarely, if ever, observe that same time interval twice? **
Because you are concentrating more and you are not trying to repetitively hit the button at the same time.
** Do you think this program is accurate to .1 or .01 ... **
b. The TIMER program is capable of determining the time between two events accurately to within about .01 second.
** Copy of a few lines of your spreadsheet from the TIMER program. **
regular breaths at the beg. of inhalation
event number clock time time interval
1 71.88281 71.88281
2 77.625 5.742188
3 84.23047 6.605469
4 90.23438 6.003906
5 95.00781 4.773438
** **
About 30 minutes.
** **
You averaged the wrong quantity on the first question. Otherwise everything looks great.
However, be very sure to see my notes on that first question.
&#Let me know if you have questions. &#