A bolt manufacturer wants to investigate the machine that produces bolts with a

Question

A bolt manufacturer wants to investigate the machine that produces bolts with a diameter of 0.240 centimeters. If the variance of the diameters is equal to 0.03, then the machine is working as expected. A random sample of 17 bolts has a standard deviation of 0.2846 Does the manufacturer have evidence at the = 0.025 level that the variance of the bolt diameters is more than required? Assume the population is normally distributed.

Step 2 of 5 : Determine the critical value(s) of the test statistic. If the test is two-tailed, separate the values with a comma. Round your answer to three decimal places.

PLEASE ONLY ANSWER THIS QUESTION:

Step 2 of 5 : Determine the critical value(s) of the test statistic. If the test is two-tailed, separate the values with a comma. Round your answer to three decimal places.

Please HIGHLIGHT the final answer. do not answer any other question. thank you

Explanation / Answer

The test is a right tailed test and

Degrees of freedom = n - 1 = 17 - 1 = 16

Hence,

Critical value = 28.845

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