04/02/20

please help me find the min sample size!

An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. He believes that the mean income is , and the variance is known to be . How large of... more

04/01/20

Standard Deviation

Suppose we take a sample of size 47 from a population with μ  = 30 and σ= 49What is the standard deviation of the sampling distribution of mean? σ = _____ (round to 1 decimal)Suppose you want to... more

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