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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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
Transcribed Image Text:A safety administration conducted crash tests of child booster seats for cars. Listed below are results
from those tests, with the measurements given in hic (standard head injury condition units). The safety
requirement is that the hic measurement should be less than 1000 hic. Use a
0.05 significance level to test the claim that the sample is from a population with a mean less than 1000
hic. Do the results suggest that all of the child booster seats meet the specified requirement?
670 603 1014 534 501 662
What are the hypotheses?
. H μ< 100 hic
O B. Ho: H= 1000 hic
Hi: με 1000 hic
Η: μ< 1000 hic
OD. Ho: H = 1000 hic
OC. Họ: u> 1000 hic
Hi μ< 1000 hic
Hi με 1000 hic
What is the test statistic?
Z =
(Round to two decimal places as needed.)
What is the P-value?
P-value =
(Round to four decimal places as needed.)
State the final conclusion that addresses the original claim.
- ( fail to reject/reject ) HO. There is
_( sufficient/not sufficient)
evidence to support the claim that the sample is from a population with a mean less than 1000 hic.
What do the results suggest about the child booster seats meeting the specified requirement?
A.There is not strong evidence that the mean is less than 1000hic, and one of the booster seats has a
measurement that is greater than 1000 hic.
B. The results are inconclusive regarding whether one of the booster seats could have a measurement that
is greater than 1000 hic.
C.There is strong evidence that the mean is less than 1000 hic, but
one of the booster seats has a measurement that is greater than 1000 hic.
D. The requirement is met since most sample measurements are less than 1000 hic
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