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# \$6.00(TCO C, D) Tesla Motors needs to buy axles for their new car. They are considering using Chris Cross Manufacturing as a

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(TCO C, D) Tesla Motors needs to buy axles for their new car. They are considering using Chris Cross Manufacturing as a vendor. Tesla's requirement is that 95% of the axles are 100 cm ± 5 cm. The following data is from a test run from Chris Cross Manufacturing. Should Tesla select them as a vendor? Explain your answer.

Descriptive statistics

 count 16 mean 99.85 sample variance 4.627 sample standard deviation 2.151 minimum 96.9 maximum 104 range 7.1 population variance 4.338 population standard deviation 2.083 standard error of the mean 0.538 tolerance interval 95.45% lower 95.548 tolerance interval 95.45% upper 104.152 margin of error 4.302 1st quartile 98.85 median 99.2 3rd quartile 100.55 interquartile range 1.7 mode 103

(Points : 25)
Teslas´requirements are

Lower value is 95

Upper value is 105, at the 2 st dv value of 5 which means 1 st dv is 2.5 +/- but the population st dv is 2.083 which is smaller than 2.5. Also sample interval is outside of tolerance interval of population, so all this indicate that we should not select Tesla as a vendor

Tutorial

\$6.00
(TCO C, D) Tesla Motors needs to buy axles for their new car. They are considering using Chris Cross Manufacturing as a
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• Posted on Dec 13, 2011 at 11:07:32PM
A:
Preview: ... andard deviation 2.083 standard error of the mean 0.538 tolerance interval 95.45% lower 95.548 tolerance interval 95.45% upper 104.152 margin of error 4.302 1st quartile 98.850 median 99.200 3rd quartile 100.550 interqua ...

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