Phy 232
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. The first column counts how many times you have clicked the timer. The second column looks like it records the time since the program has been opened. The third column records the difference between the time above it.
** Your TIMER data from 20 fast clicks **
1 127.3125 127.3125
2 127.4531 .140625
3 127.5938 .140625
4 127.7188 .125
5 127.8594 .140625
6 128 .140625
7 128.125 .125
8 128.25 .125
9 128.4063 .15625
10 128.5469 .140625
11 128.6719 .125
12 128.8125 .140625
13 128.9531 .140625
14 129.0938 .140625
15 129.2344 .140625
16 129.375 .140625
17 129.5156 .140625
18 129.6563 .140625
19 129.7969 .140625
20 129.9531 .15625
21 130.0938 .140625
22 130.2344 .140625
23 130.375 .140625
** Your average time interval for 20 time intervals **
0.13203 sec
I used the overall average by subtracting the time at 20 and the time at 1 and dividing by 2.
** Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
.125, 3
.140625, 16
.15625, 1
** Your general comment to this point **
N/A
** Why did you observe only certain time intervals? **
The timer program isn't flawed; however, it seems, by looking at my data too, that the TIMER program rounds every difference to the 5 closest to the number. It is not exactly accurate but it is in the middle of all of the numbers so as to be as accurate as possible.
** What did you see when you looked at the differences between time successive time intervals? **
the TIMER program is trying to make the differences between one time interval and the next over all of the intervals add up to 0. If you add up the fourth column you get -0.00002, which is very close to being a 0 difference overall. Therefore, by rounding the program is correcting for its mistakes and trying to get the error to zero.
** Your time intervals for 7 complete breaths: **
4.0625
3.078125
4.359375
5.078125
5.09375
3.890625
5.1875
5.046875
5.9375
7.28125
** Your general comment to this point: **
You seem to breath very slowly...
when resting that can be the case; with strenuous physical activity the rate naturally goes up
** Why did you rarely, if ever, observe that same time interval twice? **
I expected it because when you are clicking as fast as you can. You realize that you can really only click so fast and once that is reached it is pretty much the same throughout. With relaxed breathing, your body responds differently when you take deep breaths or short breaths or hold the air in longer, so it is harder to 'normalize' and get a regular time interval between breaths.
** Do you think this program is accurate to .1 or .01 ... **
c, because the shortest time interval i see is 0.0001, and that number is probably rounded on the last digit, so I am going to say that it is accurate up until the last digit of 0.001
** Copy of a few lines of your spreadsheet from the TIMER program. **
Assignment 0
event number,clock time,time interval
1 , 837.2969 , 837.2969
2 , 841.3594 , 4.0625
3 , 844.4375 , 3.078125
4 , 848.7969 , 4.359375
5 , 853.875 , 5.078125
6 , 858.9688 , 5.09375
7 , 862.8594 , 3.890625
8 , 868.0469 , 5.1875
9 , 873.0938 , 5.046875
10 , 879.0313 , 5.9375
11 , 886.3125 , 7.28125
My file opened automatically, not giving me the options stated above in 4-6. I am not sure if this style copied above is okay.
** **
20 minutes
** **
Good work, but based on your data an accuracy of .001 seconds appears unlikely.
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