Perform the Required Chi-Square Hypothesis Test

question 26

Essay

Perform the required chi-square hypothesis test. Preliminary data analyses and other information indicate that it isreasonable to assume that the variable under consideration is normally distributed. Use the critical-value approach or theP-value approach as indicated.
-A manufacturer uses a new production method to produce steel rods. Under the old production method, the standard deviation of the lengths of the rods was 3.5 cm. The standard deviation of the lengths of a random sample of 17 steel rods produced under the new method was 2.4 cm. At the 0.10 significance level, test whether the standard deviation of the lengths of the new rods is different from 3.5 cm. Use the critical-value approach.

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Definitions:

Hydrochloric Acid

A strong, corrosive acid that is a major component of gastric juice, aiding digestion by breaking down foods and killing microbes.

Nasogastric

Relating to or involving the nose and the stomach, especially a tube that goes from the nose to the stomach for feeding or medication.

Alimentary Canal

The whole passage along which food passes through the body from mouth to anus, including the esophagus, stomach, and intestines.

GB

Commonly used as an abbreviation for Gallbladder, an organ that stores bile produced by the liver.