Mean and standard deviation of the variable
Determine the mean and standard deviation of the variable x in the binomial distribution where n= 4 and ? = .80
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We estimate the mean price of a cell phone in the Bay Area using a 95% level of confidence. From a random sample of 25 stores the mean price was found to be $150 with a standard deviation of $15
For a hypothesis test of a difference of means with n1=35 and n2=45, what is the value for the degrees of freedom, df?
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