You are a quality control engineer and you are asked to analyze the lifetime (in hours)
of an electronic component mass-produced by a corporation. management believes that
the electronic components are not lasting as long as they should. the data from your
pilot study of 10 randomly selected components resulted in the following lifetimes for
parts (in hours) :
50
48
61
42
63
57
51
45
a. assuming the lifetimes follow a normal distribution, and based on the above sample,
develop a 95% confidence interval for the mean lifetime of this type of electronic
component.