QUESTION TWO [40 MARKS] 2.1 A company took a sample of 36 published books. The sample had a mean price of R70.50, with standard deviation of R4.50 for all the books. a) Calculate the point estimate of the mean price for all the textbooks. [5] b) Calculate the \( 90 \% \) confidence interval for the mean price of all textbooks.
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- Sample size (\(n\)) = 36 - Sample mean (\(\bar{x}\)) = R70.50 - Sample standard deviation (\(s\)) = R4.50 Show more…
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