A manufacturing plant has two assembly lines for producing glass bottles. The manager
was concerned about whether the proportion of defective bottles differs between the two
assembly lines. She gathered two independent samples and found the following data:
n 1 =100, ^p 1 =.1,n 2 =100, ^p 2 =.13.
(a) Set up the appropriate null and alternative hypotheses.
(b) Compute the value of the test statistic.
(c) Draw a conclusion as to whether there is a difference between the two assembly lines