Cost of Braces The average cost for teeth straightening with metal braces is approximately $5475. A nationwide franchise thinks that its cost is below that figure. A random sample of 23 patients across the country had an average cost of $5219 with a standard deviation of $624. At a=0.05, can it be concluded that the mean is less than $5475? Assume that the population is approximately normally distributed. Part 1 of 5 (a) State the hypotheses and identify the claim. H: μ = H₁: μ< This hypothesis test is a one-tailed Part: 1/5 5475 not claim Part 2 of 5 $5475 claim (b) Find the critical value(s). Round the answer(s) to at ast three decimal places. If there is more than one critical value, separate them with commas. Critical value(s): 0.0.... ▼test. X 3

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
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C. Compute the test value D. Make a decision
Cost of Braces The average cost for teeth straightening with metal braces is approximately $5475. A nationwide franchise thinks that its cost is below that
figure. A random sample of 23 patients across the country had an average cost of $5219 with a standard deviation of $624. At a=0.05, can it be concluded that
the mean is less than $5475? Assume that the population is approximately normally distributed.
Part 1 of 5
(a) State the hypotheses and identify the claim.
H: μ
Part: 1 / 5
▼
H₁: μ<
This hypothesis test is a one-tailed
Part 2 of 5
5475 not claim
$5475 claim
(b) Find the critical value(s). Round the answer(s) to at ast three decimal places. If there is more than one critical value, separate them with commas.
Critical value(s):
00....
test.
X
3
Transcribed Image Text:Cost of Braces The average cost for teeth straightening with metal braces is approximately $5475. A nationwide franchise thinks that its cost is below that figure. A random sample of 23 patients across the country had an average cost of $5219 with a standard deviation of $624. At a=0.05, can it be concluded that the mean is less than $5475? Assume that the population is approximately normally distributed. Part 1 of 5 (a) State the hypotheses and identify the claim. H: μ Part: 1 / 5 ▼ H₁: μ< This hypothesis test is a one-tailed Part 2 of 5 5475 not claim $5475 claim (b) Find the critical value(s). Round the answer(s) to at ast three decimal places. If there is more than one critical value, separate them with commas. Critical value(s): 00.... test. X 3
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