phy201
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 **
When I clicked on the timer it showed numbers 1-10. Each after each number there was another set of nubers that range from 27.53516 to 32.01172 and by each of those number is a smaller number that ranges 1.21-.625.
** Your TIMER data from 20 fast clicks **
359.3867 359.3867
2 359.5273 .140625
3 359.7773 .25
4 359.918 .140625
5 360.043 .125
6 360.1992 .15625
7 360.3242 .125
8 360.4492 .125
9 360.5859 .1367188
10 360.7305 .1445313
11 360.8672 .1367188
12 360.9922 .125
13 361.1328 .140625
14 361.3672 .234375
15 361.6172 .25
16 361.8828 .265625
17 362.0078 .125
18 362.1484 .140625
19 362.2578 .109375
20 362.5078 .25
21 362.6328 .125
22 362.8828 .25
23 363.2852 .4023438
24 363.4258 .140625
25 363.5352 .109375
26 363.6758 .140625
27 363.7852 .109375
28 364.2695 .484375
29 364.5039 .234375
30 364.6445 .140625
31 364.7539 .109375
32 365.0977 .34375
33 365.2227 .125
34 365.5938 .3710938
35 366.4688 .875
36 366.9375 .46875
37 367.2813 .34375
38 367.4063 .125
** Your average time interval for 20 time intervals **
18.1253897
I did this by adding up all the intervals and then dividing by 20.
I tried to use a spreadsheet, but i could not get it to work.
&#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. &#
** Your frequency distribution for the 20 time intervals (interval, number of times it was observed) **
359.3867, 1
.140625,4
.25,3
.125,5
.15625,1
.1367188,2
.1445313,1
.234375,1
.265625,1
.109375,1
** Your general comment to this point **
Actually I am not sure about any of this whole process, but hopefully I will by the end of this tutorial.
** Why did you observe only certain time intervals? **
I dont think that it is flawed or useless, maybe it is just an estimation of time, not an exact time.
** What did you see when you looked at the differences between time successive time intervals? **
It tells us that it calculates the difference from one interval to the next one, so it is calculating how long it takes for one interval to get to the next interval.
** Your time intervals for 7 complete breaths: **
1 3.594
2 3.054688
3 4.058594
4 3.695313
5 4.136719
6 4.023438
7 4.179688
8 3.808594
9 4.476563
10 3.742188
** Your general comment to this point: **
** Why did you rarely, if ever, observe that same time interval twice? **
I think that this is because the time interval are the difference between one clock time to the next. In the example the clock time 1569.734- 1582.75 = 13.016. The reason we do not see the intervals repeated is because we hit the timer every inhale we may not have clicked the timer at such a random pace compared to if we were hitting it as fast as we could which may increase the chance of hitting the button twice at the same pace.
** Do you think this program is accurate to .1 or .01 ... **
The TIMER program is capable of determining the time between two events accurately to within about .01 second.
Because the smallest amount of digits beyond the decimal stops at 2, 1582.75.
** Copy of a few lines of your spreadsheet from the TIMER program. **
event number clock time time interval
1 2203.594 2203.594
2 2206.648 3.054688
3 2210.707 4.058594
4 2214.402 3.695313
5 2218.539 4.136719
6 2222.563 4.023438
7 2226.742 4.179688
8 2230.551 3.808594
9 2235.027 4.476563
10 2238.77 3.742188
** **
about an hour
** **
Good work, but see my first note. Your reported average time interval for quick clicks is clearly less than .25 seconds; this does not agree with the average you report. My note indicates the likely reason for this, which is easy to correct.
&#This looks very good. Let me know if you have any questions. &#