Specifications call for the wall thickness of two-liter polycarbonate bottles to average 4.0 mils. A quality control
Question:
a. Make a dotplot of the seven values.
b. Should a Student's t test be used to test H0? If so, perform the test. If not, explain why not.
c. Measurements are taken of the wall thicknesses of seven bottles of a different type. The measurements this time are: 4.065, 3.967, 4.028, 4.008, 4.195, 4.057, and 4.010. Make a dotplot of these values. d. Should a Student's t test be used to test H0 :μ ( 4.0 versus H1 :μ ( 4.0? If so, perform the test. If not, explain why not.
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