Given the data sets: Data set A: 35.8, 40.4, 30.3, 46.8, 34.1, 34.0, 38.1, 45.0, 41.9, 40.2 Data set B: 40.9, 35.7, 36.7, 37.3, 41.8, 39.9, 34.6, 38.8, 35.8, 35.6
(a) Determine if there is a difference in the means at a level of 0.05 for the data.
(b) Determine if the variability of data set A is larger.
(c) Describe manufacturing, development, and service examples from which the data could have originated.