1.Mr. Blanchard claims his 6th grade science class is very smart. His class with 36 students has an average score of 89 on the final exam. Among the population of 6th graders it's known that the average score is 82 with a population standard deviation of 4. Based on the available data, should we believe Mr. Blanchard's claim (level of risk at .05)?

a.State the null hypothesis.

b.Which statistical test is appropriate in this situation?

c.Calculate the test statistic.

d.State your conclusion.