Question

b) Bags of a certain brand of tortilla chip are supposed to contain 50g of chips. Following complaints, a consumer advocacy group believed that the bags of chips were actually underfilled. To test this belief they selected a random sample of 8 bags of chips and accurately weighed their contents. The weights of the bags were as follows: 47.2 51.7 51.1 45.3 48.2 47.1 48.3 50.3 (i) State the hypotheses of interest to the consumer advocacy group. (3 marks) (ii) Carry out the appropriate test so that the probability of a Type I error is 1%. State your conclusions clearly. (77 marks) (iii) What assumption are you making about the population distribution for this test? Use your data to check if the assumption is reasonable. (5 marks)

Answer 1