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It is reportedthat the average or mean number of Facebook friends is 155. Suppose that when55randomly chosen Facebook users are polled regarding the number of
It is reportedthat the average or mean number of Facebook friends is 155. Suppose that when55randomly chosen Facebook users are polled regarding the number of their friends, the average number of their friends was reported to bex=150
with a standard deviation ofs=29.8.
The valuezcorresponding to the observed sample mean and standard deviation is1.24.
What is the probability of observing a value ofzgreater than1.24or less than1.24?
(Round your answer to four decimal places.)
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