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
Finally got the program to work. Thanks for the help!
(this makes the third time redoing this page, due to closing the page or hitting backspace [which is a shortcut to go back])
Describe what you see on your first 10 clicks
Each time the click to time event button is pressed, data is recorded in a white area just below the button. The data consists of: the number of click (on the left), the clock time (in the middle), the time intervals (on the right). The clock time is recorded based on the time the program is started to the time the click to time event button is clicked. This causes a flaw in the first time interval which will be the *outlier.
Your TIMER data from 20 fast clicks
1 11.33594 *11.33594
2 11.46875 .1328125
3 11.57813 .109375
4 11.71875 .140625
5 11.82813 .109375
6 11.95703 .1289063
7 12.07813 .1210938
8 12.19922 .1210938
9 12.32813 .1289063
10 12.45703 .1289063
11 12.57813 .1210938
12 12.71875 .140625
13 12.84766 .1289063
14 12.98047 .1328125
15 13.12109 .140625
16 13.25 .1289063
17 13.37891 .1289063
18 13.51953 .140625
19 13.66016 .140625
20 13.80078 .140625
*outlier
Your average time interval for 20 time intervals
0.129728642
The average was obtained by using 19 time intervals instead of 20 due to the outlier (which was thrown out). The 19 time intervals were pasted into Excel and the =AVERAGE( Function was used to get the average of the time intervals.
Your frequency distribution for the 20 time intervals (interval, number of times it was observed)
0.109375, 2
0.1210938, 3
0.1289063, 6
0.1328125, 2
0.140625, 6
Your general comment to this point
Why did you observe only certain time intervals?
-I think it is because the TIMER program only records data to 7 decimal places which affects the time interval calculation.
-The interval times were based on the difference in time intervals so if the last few decimal places to the right were equal, it would mean they would equal 0 and therefor not recorded.
-It does not mean that the TIMER program is flawed, but that it isn't as accurate as it could be.
-It isn't useless because it records data more precise than what a human could record.
What did you see when you looked at the differences between time successive time intervals?
The column only records 3 diffent numbers reguardless of being positive or negative. This could mean that the calculations of the click is rounded off to 0.015625 of a second.
Your time intervals for 7 complete breaths:
10.45508
12.59766
12.98926
16.50391
21.49121
21.19043
21.43066
23.55371
23.08301
Your general comment to this point:
Why did you rarely, if ever, observe that same time interval twice?
There is a much larger marginal & clock time isnt constant between events which means it is more likely to have different time intervals.
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.
The timer program rounds off to a certain decimal of a second. Observing my data on the 20 clicks, the lowest difference was 0.0039062 second but not .001 second. So this is only safe to say that it is accurate to the nearest .01 second.
Copy of a few lines of your spreadsheet from the TIMER program.
reathing time
event number clock time time interval
1 1.731445 1.731445
2 12.18652 10.45508
3 24.78418 12.59766
4 37.77344 12.98926
5 54.27734 16.50391
25 Minutes
It's good to know how to open the files in excel so that the program seperates the data itself instead of the user having to. This will save me time in the future. Thanks for sharing the data!
Good work. We'll be discussing this in class.