timer program

Your work on timer program 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

Each time I click the button it gives me two numbers. the number on the left is how many seconds since I begun timing and then number on the left is how many seconds since I last clicked.

Your TIMER data from 20 fast clicks

1 41.84375 41.84375

2 42.0625 .21875

3 42.25 .1875

4 42.4375 .1875

5 42.625 .1875

6 42.82813 .203125

7 43.03125 .203125

8 43.21875 .1875

9 43.4375 .21875

10 43.64063 .203125

11 43.82813 .1875

12 44.03125 .203125

13 44.23438 .203125

14 44.4375 .203125

15 44.64063 .203125

16 44.82813 .1875

17 45.04688 .21875

18 45.25 .203125

19 45.4375 .1875

20 45.64063 .203125

Your average time interval for 20 time intervals

.1898

(45.64063-41.84375)/20

Your frequency distribution for the 20 time intervals (interval, number of times it was observed)

.1875,7

.203125,9

.21875, 3

Your general comment to this point

Why did you observe only certain time intervals?

I think the unusual frequency is due to the measurements only going to a certain decimal place. Maybe it only goes by 5's after a certain point. The number is not useless unless you need a number that goes to the 1000th of a second.

What did you see when you looked at the differences between time successive time intervals?

the time counts in intervals of .01563.

Your time intervals for 7 complete breaths:

4.921875

7.015625

8.46875

8.046875

6.1875

6.203125

6.484375

6.359375

8.03125

6.96875

Your general comment to this point:

Why did you rarely, if ever, observe that same time interval twice?

the intervals were longer thus more room for differences

Do you think this program is accurate to .1 or .01 ...

A. Because once we get to the hundreth of a second .01, the numbers in the first part of the excercise were unusually constant which suggests it's inaccurate at this level

Copy of a few lines of your spreadsheet from the TIMER program.

series of breaths

event number clock time time interval

1 2686.906 2686.906

2 2691.828 4.921875

3 2698.844 7.015625

4 2707.313 8.46875

5 2715.359 8.046875

6 2721.547 6.1875

7 2727.75 6.203125

8 2734.234 6.484375

9 2740.594 6.359375

10 2748.625 8.03125

11 2755.594 6.96875