1. Find the range and standard deviation of the set of data
1325, 25, 225, 75, 315
2. An assembly-line machine turns out washers with the following thicknesses (in millimeters). Find the mean and standard deviation of the thickness.
1.52, 1.76, 1.25, 2.09, 1.32, 1.29, 1.98, 1.49
2.03, 1.52, 1.65, 1.36, 1.48, 1.56, 1.93, 1.76
3. Find the mean and standard deviation for the individualized instruction scores.
|
Scores
|
Individualized Instruction
|
|
50-59
|
2
|
|
60-69
|
4
|
|
70-79
|
6
|
|
80-89
|
11
|
|
90-99
|
8
|