The Table Below Shows the Mean Number of Daily Errors $\quad$

question 42

Multiple Choice

The table below shows the mean number of daily errors by seven 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 have decreased from Week 1 to Week 2. $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Trainee }$
$\begin{array}{|c|c|c|c|c|c|c|c|}\hline&\text { T1 } & \text { T2 } & \text { T3 } & \text { T4 } & \text { T5 } & \text { T6 } & T 7 \\\hline \text { Week 1 }&5.1 & 3 & 12.1 & 6.2 & 11.5 & 7.8 & 2.2 \\\hline \text { Week 2}&3.2 & 2.2 & 8.7 & 7.7 & 9.4 & 7.8 & 3.1 \\\hline\end{array}$ The right-tailed critical value at ? = 0.05 is:

• A)1.895
• B)1.943
• C)2.447
• D)2.365

---

Definitions:

Latency

In psychoanalytic theory, a period of childhood development characterized by the sublimation of instinctual drives; it is considered a phase of relative psychological calm.

Oral Stage

The first phase in Freud's psychosexual development theory, where an infant's pleasure centers are in the mouth, leading to behaviors like sucking and biting.

Fixated

The psychological state or condition of being obsessively focused or attached to a person, thing, or idea.

Latency

The period of delay or the time between the initiation of an action or process and its effect or outcome.