2.) A process produces cable for the local telephone company.
When the process is operating correctly, cable diameter follows a
normal distribution with mean 4 inches. A random sample of 5pieces
of cable found diameters with a sample mean of 3 inches and a
sample standard deviation of 5÷9 inches.
a) State your hypothesis H0 and H1 claiming that the process is
operating correctly.
b) State the decision rule, sample statistics, table value and test
statistic in the same order...