The Table Below Shows the Mean Number of Daily Errors

question 8

Multiple Choice

The table below shows the mean number of daily errors by air traffic controller trainees during the first two weeks on the job.We want to perform a paired t-test at  = .05 to see if the mean daily errors decreased significantly. The test statistic is:

• A) 1.25
• B) 1.75
• C) 0.87
• D) 0.79

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Definitions:

Alternatives

Different options or choices available in any given situation, allowing for flexibility in decision-making processes.

Activities

Engagements or tasks that individuals or groups undertake, often with a specific purpose or objective in mind.

Attitudes

Mental and emotional entities which predispose an individual's response to various situations, objects, or people.

Actual Results

The concrete outcomes or outputs that are achieved at the end of a project or period, often compared against planned objectives or goals.