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To estimate if there is a difference between the average daily sales of two branches of a department store, the following data has been gathered: Downtown Store: n1=12, x1=$36,000, s1=$1,200 North Mal

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An airline has classified its customers as highvolume travelers (assumed to be business travelers) or lowvolume travelers (assumed to be leisure travelers). Seventyfive (75) percent are high volume
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 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
 2. What are the steps espoused by Applied Statistics in Business and Economics for formal hypothesis testing? Why is the sequence important?