The average cost for teeth straightening with metal braces is approximately $541

Question

The average cost for teeth straightening with metal braces is approximately $5416 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 $5228 with a standard deviation of$623. At alpha = 0.025, can it be concluded that the mean is less than $5416? Assume that the population is approximately normally distributed. State the hypotheses and identify the claim with the correct hypothesis. H_0: mu $ H_: mu $ This hypothesis test is a test.

Explanation / Answer

H0 : = 5416

H1 : < 5416

The hypothesis test is a t test. Because population standard deviation is unknown and sample standard deviation is known

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