Mathematics, 20.03.2020 21:37 kaylastronaut
#1) The average cost for teeth straightening with metal braces is approximately $5400. A nationwide franchise thinks that its cost is below the figure. A random sample of 28 patients across the country had an average cost of $5250 with a standard deviation of $629. At alpha = 0.025, can it be concluded that the mean is less than $5400?
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#1) The average cost for teeth straightening with metal braces is approximately $5400. A nationwide...
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