Question

BTGE2033 Engineering Statistics Make Good Assignment os. 11 cans of products are randomly selected from food canning factory A. Data on the weight of food content, in grams, are listed below: 502, 499, 506, 503, 496, 498, 505, 50, 500, 508, 504 more than 500 g. Obtain a 99% confidence interval for the standard deviation. (a) Test, at 5% level of significance, the claim that the mean weight of food content is (7 marks) (3 marks) (c) A random sample of 9 cans of food canned by factory B has mean content weight of (b) 500 g and a standard deviation of 4 g. Obtain a 90% confidence interval for the difference in mean content weight for cans from these two factories. Assume the ent weights of cans in these two factories follow normal distribution with equal cont variance (5 marks) 06. In a random sample of 300 Brand A smart phones, 75 require battery replacement within 3 years. In a random sample of 200 Brand B smart phones, 42 require battery replacement Brand A smart phones that

Answer 1