Suppose you want to test the claim that a population mean equals 40.
(a) State the null hypothesis.
(b) State the alternate hypothesis if you have no information regarding how the population mean might differ from 40.
(c) State the alternate hypothesis if you believe (based on experience or past studies) that the population mean may exceed 40.
(d) State the alternate hypothesis if you believe (based on experience or past studies) that the population mean may be less than 40.