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3
Confidence Intervals to Assess Variation
in Fat Content at a Fast-Food Restaurant
Hamburrgerr, Inc. is a fast-food restaurant serving hamburgers among a few
other items. The restaurant claims that the average fat content in the ham-
burgers is 15 grams.
Section 3.1 gives a brief description of the dene phase. Section 3.2 illus-
trates the measure phase with detailed instructions for using Minitab
®
. The
analyze phase is briey discussed in Section 3.3. Section 3.4 illustrates the
improve phase with detailed instructions for using Minitab
®
. Finally, the
control phase is briey discussed in Section 3.5.
3.1 Define Phase
A few of the customers comp ...