Problem $4A($np and $p$ charts$).$ A process produces rubber

belts in lots of size $2,500.$ Inspection records on the last $20$

lots reveal the data in Table $7$E$\mathrm{.}7.$

$(1)$ Compute trial control limits for a fraction

nonconforming control chart $($a$.$k$.$a Type II p$-$chart$).$

$(2)$ Compute trial control limits for a fraction $np$ control

chart $($a$.$k$.$a Type II np$-$chart$).$

$(3)$ Is this process in control? Please complete Type II p$-$

TABLE $7E\mathrm{.}7$

Inspection Data for Exercise $7\mathrm{.}13$

chart by plotting daily fraction from Day $1$ to Day $10$ onto the chart.

$(4)$ Is this process in control? Please complete Type II np$-$chart by plotting daily fraction from

Day $1$ to Day $10$ onto the chart.