Paper 7 May/June 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.

Previous records have shown that the number of cars entering Bampor on any day has mean 352 and variance 121.
a) Find the probability that the mean number of cars entering Bampor during a random sample of 200 days is more than 354.
b) State, with a reason, whether it was necessary to assume that the number of cars entering Bampor on any day has a normal distribution in order to find the probability in part (a).
c) It is thought that…