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Terms in this set [11]
1] The mean amount of money that US adults spend on food in a week is $151 and the standard deviation is $49. Random samples of size 50 are drawn from this population and the mean of each sample is determined.
a] Find the mean and standard deviation of the sampling distribution of the sample means.
b] What is the probability that the mean amount spend on food in a week for a certain sample is more than $160?
c] What is the probability that the mean amount spend on food in a week for a certain sample is between $135 and $150?
2] Given a random variable x is normally distributed with a mean µ=18 and standard deviation σ=7.6, find the following probabilities:
a] P[x>20]
b] P[0