Two sample Z test of proportions is the test to determine whether the two populations differ significantly on specific characteristics.
One sample Z hypothesis test is one of the basic tests of inferential statistics. It is a parametric procedure for hypothesis testing.
Attribute chart: c chart is also known as the control chart for defects is generally used to monitor the number of defects in constant size.
Attribute chart: u chart is the control chart for defects per unit. It is used to monitor the count type of data where the sample size is>1.
Attribute chart: np chart is generally used to monitor the number of non-conforming or defective items in the measurement process.