The Manager of the Quality Department for a Tire Manufacturing

question 59

True/False

The manager of the quality department for a tire manufacturing company wants to know the average tensile strength of rubber used in making a certain brand of radial tire.The population is normally distributed,and the population standard deviation is known.She uses a z test to test the null hypothesis that the mean tensile strength is 800 pounds per square inch.The calculated z test statistic is a positive value that leads to a p-value of .045 for the test.If the significance level (α)is .05,the null hypothesis would be rejected.

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Definitions:

Prevalence Of Smoking

The proportion of a population that smokes, measured at a specific point in time.

Anonymous Survey

A survey in which the identities of the respondents are not known to the researchers, ensuring privacy and encouraging honest answers.

Case-control Study

An observational study design in which two groups differing in outcome are identified and compared on the basis of some supposed causal attribute.

Outcome Variable

The variable being measured or tested in an experiment or study to assess the effects of treatment or exposure.