How do the MEAN and STANDARD DEVIATION change if you have new data values?

Today we looked at how the mean and standard deviation change if you have new data values.

Here are the notes for the mean:

and for the standard deviation:

SUMMARY:

• If the NEW VALUE is HIGHER than the original MEAN, the MEAN will INCREASE.

 

• If the NEW VALUE is LOWER than the original MEAN, the MEAN will DECREASE.

 

• If the NEW VALUE is BETWEEN the values of the mean minus the standard deviation and the mean plus the standard deviation, the STANDARD DEVIATION will DECREASE.

 

• If the NEW VALUE is NOT BETWEEN the values of the mean minus the standard deviation and the mean plus the standard deviation, the STANDARD DEVIATION will INCREASE.

ASSIGNMENT: 

Complete this page (done in class unless absent). The first is done as an example, below. See me if you need a copy of this.

After that was done, we worked on the practice from last time (the packet labeled "Z-Score"). Please continue working in that packet, in support class; it will be a grade.