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 **
There are two columns of numbers the first column is the time at which the button was clicked the number in the second column was the difference in clock time from the last time the button was clicked.
** Your TIMER data from 20 fast clicks **
1 199.5156 199.5156
2 199.7031 .1875
3 199.875 .171875
4 200.0313 .15625
5 200.1875 .15625
6 200.3438 .15625
7 200.5313 .1875
8 200.6875 .15625
9 200.875 .1875
10 201.0156 .140625
11 201.2188 .203125
12 201.3906 .171875
13 201.5625 .171875
14 201.7344 .171875
15 201.9063 .171875
16 202.0625 .15625
17 202.2188 .15625
18 202.3906 .171875
19 202.5625 .171875
20 202.7344 .171875
21 203.1719 .4375
22 203.1719 0
** Your average time interval for 20 time intervals **
0.1741071429
To get this number I added up all 21 values and divided by 21.
** Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
.1875, 3
.171875, 8
.15625, 6
.140625, 1
.203125, 1
.4375, 1
0, 1
** Your general comment to this point **
** Why did you observe only certain time intervals? **
The timer just rounds the change in clock time so that the numbers will be easier to work with. When we are working with fractions of a second these numbers are probably going to be precise enough that they will not cause any major errors unless we are working with very small amounts of time. Thus this program is useful unless you are working with hundreths of a second in which case you would need a more precise clock.
** What did you see when you looked at the differences between time successive time intervals? **
Sometimes due to rounding and other errors the difference between intervals is negative.
** Your time intervals for 7 complete breaths: **
3.6875
5.734375
5.1875
5.234375
4.578125
5.578125
5.21875
6.203125
4.109375
** Your general comment to this point: **
** Why did you rarely, if ever, observe that same time interval twice? **
Because the length of breaths varried more than the time between mouse clicks. Also there was a wider average change in clock time between breaths as opposed to in between mouse clicks.
** Do you think this program is accurate to .1 or .01 ... **
A
** Copy of a few lines of your spreadsheet from the TIMER program. **
breaths beginning @ inhale
event number clock time time interval
1 1624.406 1624.406
2 1628.094 3.6875
3 1633.828 5.734375
4 1639.016 5.1875
5 1644.25 5.234375
6 1648.828 4.578125
7 1654.406 5.578125
8 1659.625 5.21875
9 1665.828 6.203125
10 1669.938 4.109375
** **
45 minutes
** **
&#Very good responses. Let me know if you have questions. &#