PHY 122
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 **
10 rows; each with a large number starting at 239.3828 to 241.9375 on the left hand side and the difference in time between each interval on the right hand side.
** Your TIMER data from 20 fast clicks **
1 346.4141 346.4141
2 346.5781 .1640625
3 346.7578 .1796875
4 346.9375 .1796875
5 347.1094 .171875
6 347.2891 .1796875
7 347.4453 .15625
8 347.625 .1796875
9 347.8047 .1796875
10 347.9688 .1640625
11 348.1484 .1796875
12 348.3281 .1796875
13 348.5078 .1796875
14 348.6797 .171875
15 348.8594 .1796875
16 349.0156 .15625
17 349.2031 .1875
18 349.3828 .1796875
19 349.5625 .1796875
20 349.7422 .1796875
21 349.9375 .1953125
22 350.1172 .1796875
** Your average time interval for 20 time intervals **
.176180875; I started with the line item 2 which represents the first interval; I added up the intervals to line 21 and then divided by 20.
** Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
.15625, 2
.1640625, 2
.171875, 2
.1796875, 12
.1875, 1
.1953125, 1
** Your general comment to this point **
** Why did you observe only certain time intervals? **
It doesn't mean that the TIMER program is flawed. It can still be used; the TIMER will be erroneous when finding short intervals.
** What did you see when you looked at the differences between time successive time intervals? **
There are consistent patterns of error.
** Your time intervals for 7 complete breaths: **
6.757813
6
6.109375
7.304688
6.15625
5.328125
6.757813
5.796875
7.320313
** Your general comment to this point: **
** Why did you rarely, if ever, observe that same time interval twice? **
The longer period of time between intervals allowed a more accurate reading to be recorded. The TIMER cannot accurately read short intervals.
** Do you think this program is accurate to .1 or .01 ... **
a. The TIMER program cannot accurate determine time events that occur within less than .1 second of each other. When we used our finger to quickly tap the time event button the TIMER program was not accurate; however, with longer intervals calculated when breathing the program is more accurate.
** Copy of a few lines of your spreadsheet from the TIMER program. **
event number clock time time interval
1 2.039063 2.039063
2 2.234375 0.1953125
3 2.4375 0.203125
4 2.617188 0.1796875
5 2.796875 0.1796875
6 3 0.203125
** **
45 minutes
** **
&#Your work looks very good. Let me know if you have any questions. &#