Paper 7 October/November 2004 MATHEMATICH (9709/7) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

A doctor wishes to investigate the mean fat content in low-fat burgers. He takes a random sample of 15 burgers and sends them to a laboratory where the mass, in grams, of fat in each burger is determined. The results are as follows.
9, 7, 8, 9, 6, 11, 7, 9, 8, 9, 8, 10, 7, 9
Assume that the mass, in grams, of fat in low-fat burgers is normally distributed with mean $\mu $ and that the population standard deviation is 1.3.
a)…