It is claimed that the average monthly income of chemical engineers last year was 27,900.00. A random sample of 35 chemical engineers is selected and it is found out that the average monthly salary is...

a. State the null and the alternative hypotheses

b. compute the test statistic

c. determine the critical value and the rejection region

d. draw a conclusion

Extracted text: It is claimed that the average monthly income of chemical engineers last year was 27,900.00. A random sample of 35 chemical engineers is selected and it is found out that the average monthly salary is P28,000.00. Using a 0.01 level of significance, can it be concluded that there is an increase in the average monthly income of chemical engineers? Assume that the population standard deviation is P250.50. CS