Mathematics, 05.03.2022 17:10 xhdud
Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected. Select the appropriate response.
A manufacturer uses a new production method to produce steel rods. A random sample of 17 steel rods resulted in lengths with a standard deviation of 4.5 cm. Use a 0.10 significance level to test the claim that the new production method has a length standard deviation that is different from 3.5 cm, which was the standard deviation for the lengths using the old method.
Select the correct test statistic and critical value.
A. Test statistic: χ2 = 23.487. Critical values: χ2 = 26.296.
B. Test statistic: χ2 = 26.449. Critical values: χ2 = 26.296.
C. Test statistic: χ2 = 23.487. Critical values: χ2 = 5.623, 29.571.
D. Test statistic: χ2 = 26.449. Critical values: χ2 = 7.962, 26.296.
Answers: 2
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