Concept explainers
a.
Construct a stem-and-leaf diagram of the force data.
b.
Compute the average and the standard deviation of the force data.
c.
Construct a normal probability plot for the data and comment on the plot.
d.
Obtain the proportion of the caps do not meet this requirement of 30 pounds.
e.
Obtain the proportion of the caps exceeds the average force plus 2 standard deviations.
f.
Check whether there seem to be possible difference in the two machines or not.
Construct an appropriate graphical display of the data.
g.
Plot the first 36 observations on the normal plot and remaining observation on another normal probability plot.
Compare the results with the single normal probability plot constructed for all the data in part (c).
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Applied Statistics and Probability for Engineers
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