XYZ University has advertised that80% of their international students are satisfied with the education facilities provided for them. A survey conducted using a random sample of 20 students found that 75% of the international students were satisfied.

With 5% significance, conduct a hypothesis test to check if the actual proportion of satisfied international students was lessthan 80%.

a. Establish the Null and Alternative hypothesis in values and words

b. Use the appropriate formula and calculate the test statistic in this hypothesis test

c. What is the critical value for this test statistic appropriate to this hypothesis test?

d. State the decision rule and your conclusion.