1. Consider the following data on the diameter of ball bearings from a particular production line.
1.18 1.42 0.69 0.88 1.62 1.09 1.53 1.02 1.19 1.32
(a) Find the sample mean and the sample variance.
(b) Find the IQR.
2. A chemical process was run using two different alcohols (Factor A) and three different bases (Factor B). The process was run twice with each alcohol/base combination, and the resulting yields are given below.
|
|
Base
|
|
|
Alcohol
|
93
|
76
|
65
|
|
95
|
78
|
61
|
|
60
|
75
|
95
|
|
64
|
79
|
93
|
Draw an interaction plot for these data. What would you conclude?