A filling machine at a local soft drinks company is calibrated to fill the cans at an average amount of 12 fluid ounces and a standard deviation of 0.5 ounces. The company wants to test whether the standard deviation of the amount filled by the machine is indeed 0.5 ounces. A random sample of 15 cans filled by the machine reveals a standard deviation of 0.67 ounces. the parameter of interest in the test is A_ Population proportion B_ samplestandard deviation or sample variance C_ Population standard deviation or population variance D_ Population mean in order to perform the test, we need to assume that the amount filled by the machine has A t distribution B normal distribution C chi-square distribution D F distribution what are the lower critical value of the test when allowing for 5% probability of committing a type I error? A 5.6287 B 26.1189
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The hypothesis test is concerned with whether the standard deviation of the amount filled by the machine is indeed 0.5 ounces. Therefore, the parameter of interest is the population standard deviation or population variance. The correct answer is C: Population Show more…
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