Part A
- The proportion of customers who are completely satisfied in a
recent satisfaction
survey of 300 customers at XYC Inc.
is found to be 0.26. (6
points)
- Test the hypothesis that the population proportion of customers
who are completely satisfied is greater than 0.22 using the
critical value approach and a 0.05 level of significance.
- Test the hypothesis that the population proportion of customers
who are
completely satisfied is less than
0.30 using the p-value approach and a
0.05 level of significance.
- Test the hypothesis that the population proportion of customers
who are completely satisfied is different from 0.24 using the
p-value approach and a 0.05 level of significance.