1. Prepare the applet for use.
Select the “Add point” button and enter a value of 0 in the input box, then select “OK”. Repeat
the above step to enter the value 20.
Select the “Reset” button to remove the data points, but leave the axis between 0 and 20. 2.
Create Set A.
Insert eight data points approximately evenly spaced between 0 and 20. Record the standard
deviation of Set A.
Select the “Reset” button to clear the data. 3. Create Set B.
Insert all eight data points very close to 10 on the number line.
Record the standard deviation of Set B.
Select the “Reset” button to clear the data. 4. Create Set C.
Insert four points close to 0 and four points close to 20.
Record the standard deviation of Set C.
Applet link
http://media.pearsoncmg.com/cmg/pmmg_mml_shared/animations/statistics/west_applets_HTM
L5/stddev.html
Post 1. Which data set has the lowest standard deviation?
2. Which has the highest?
3. I this what you expected? Why or why not?
Solution

2. 1. Which data set has the lowest standard deviation?
he lowest standard deviation:-
The 2nd Data Set has the lowest
2. Which has the highest?
The highest standard deviation:-
The 3rd Data Set has the highest.
3. Is this what you expected? Why or why not?
Yes. It was what I expected.
The reason is because the 2nd data set were all very close to each data. This meant that the
distance apart from the next data is very small, which means that it only deviates a little.For the
3rd data set which is the highest, there are two "groups" which are far from each other. As a
result of that, the data set has a farther distance from each other.