A Mail-Order Business Prides Itself in Its Ability to Fill

question 72

Multiple Choice

A mail-order business prides itself in its ability to fill customers' orders in six calendar days or less on the average.Periodically,the operations manager selects a random sample of customer orders and determines the number of days required to fill the orders.Based on this sample information,he decides if the desired standard is not being met.He will assume that the average number of days to fill customers' orders is six or less unless the data suggest strongly otherwise.Establish the appropriate null and alternative hypotheses.

• A)H₀ : μ ≥ 6 days H_a : μ < 6 days
• B)H₀ : μ ≤ 6 days H_a : μ > 6 days
• C)H₀ : μ > 6 days H_a : μ ≤ 6 days
• D)H₀ : μ < 6 days H_a : μ ≥ 6 days

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Definitions:

Contrived Settings

Artificial or engineered environments designed to simulate specific conditions or variables for experimental or research purposes.

Laboratory Studies

Controlled experiments conducted in a lab setting to explore hypotheses and examine variables in a controlled environment.

Cause-Effect Relationships

The concept that every event (cause) leads to a consequence (effect), forming the basis of rational analysis and experimental processes.

Correlational Studies

Research methodologies that examine the relationship between two or more variables to determine whether a correlation exists.