1.
Jamie is collecting a sample of people and asking them how much they pay for a movie
ticket. Most people go at night and pay full price, but there are some who go to matinees
and pay less, and then there are a few people who go to discount theaters which play
movies late in their run, and these people pay very little. Which will (most likely) be
larger the mean or the median? No need to explain.
2.
When is the second moment about the mean zero? When is the fourth moment about the
mean zero?
3.
Calculate the skew for the following data: 1, 1, 5, 7, 8, 8. (Be sure and standardize the
moment.)
4.
Calculate the kurtosis for same data. (Be sure and standardize the moment.)
5.
Why do we standardize data?
6.
What concept tells us how far, on average, the values in a given distribution are from
zero? [This question is not tricky. If you think the answer is too obvious, it may be that it
simply is obvious to you.]
7.
Estimate the standard deviation for the below distribution.
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 Fall '10
 RajendraM.Patel
 Standard Deviation, Mean, Jamie

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