Consider a sample of size n = 95. We wish to test the claim that the average weight of a container box is less than 60 tons, using an a = 1% significance level. The sample standard deviation is found to be 5 tons. The Claim, Opposite, Null and Alternate Hypothesis are: Claim: / 60 : Ho, (M - 60), Null Hypothesis a) This problem is a hypothesis test of the population mean. Which of these applies? O o known Oo unknown, with s given Neither o or s are relevant b) Identify the type of tail(s)? O left tail O right tail O two tails c) Which Excel function should you use to find the critical value? O NORM.S. INV() O T.INVO) d) What is the critical value (only give the positive value if there are two)