Exhibit 11-2

question 57

Multiple Choice

Exhibit 11-2.The manager of a video library would like the variance of the waiting times of the customers not to exceed 2.30 minutes-squared.He would like to add an additional billing counter if the variance exceeds the cut-off.He checks the recent sample data.For a random sample of 24 customer waiting times,he arrives at a sample variance of 3.8 minutes-squared.The manager assumes the waiting times to be normally distributed. Refer to Exhibit 11-2.Which of the following would be null and the alternate hypothesis to test if the cut-off is surpassed?

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Definitions:

F-Statistic

A ratio of two variances used in the analysis of variance to assess whether the means of different groups are equal.

Multicollinearity

Multicollinearity refers to the occurrence in statistical models where two or more predictor variables are highly correlated, making it difficult to distinguish their individual effects.

Parameter Estimates

Parameter estimates are values derived from statistical analysis that approximate the actual parameters of a population based on sample data.

Biased

A condition where a measure or estimate systematically deviates from the true value due to a flaw in the measurement or sampling process.