At α = 0.025, can it be concluded that the mean is less than $5400?

Nov 6th, 2015
Price: $5 USD

Question description

The average cost for teeth straightening with metal braces is approximately $5400. A nationwide franchise thinks that its cost is below that figure. A random sample of 28 patients across the country had an average cost of $5250 with standard deviation of $629. At α = 0.025, can it be concluded that the mean is less than $5400?

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