Paper 7 October/November 2008 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.

The volumes of juice in bottles of Apricola are normally distributed. In a random sample of 8 bottles, the volumes of juice, in millilitres, were found to be as follows.
332, 334, 330, 328, 331, 332, 329, 333
a) Find unbiased estimates of the population mean and variance.
A random sample of 50 bottles of Apricola gave unbiased estimates of 331 millilitres and $4.20{\text{ }}millilitre{s^2}$ for the population mean and variance…