Unit Test #75
A population has a mean of 85 kg and a standard deviation of 9 kg.
If samples of size 36 are taken, what is the expected value of the sample means?
A B C D
The mean number of rooms in each house of a city is 8 with a standard deviation of 2.5.
A statistician doing a survey wants to take samples so that the standard deviation of the sample means is 0.08. What should the sample size be?
© 2014 BestMaths