A Professor Believes the Variability in Time to Complete Tests $$\begin{array} { l l l l l } 25 & 45 & 50 & 32 & 38 \\41 & 41 & 48 & 30 & 40 \\39 & 49 & 46 & 44 & 36\end{array}$$

question 71

Essay

A professor believes the variability in time to complete tests has increased. In the past, the variance in minutes to complete a particular test was 25. The time it takes to complete a test was recorded for a sample of 15 students. The results follow. $$\begin{array} { l l l l l } 25 & 45 & 50 & 32 & 38 \\41 & 41 & 48 & 30 & 40 \\39 & 49 & 46 & 44 & 36\end{array}$$ Use Excel to determine if the variance in times has increased. Use a .02 level of significance.

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Definitions:

Psychoanalytic Approach

A therapeutic and theoretical approach developed by Freud that emphasizes unconscious processes and childhood experiences in shaping behavior and personality.

Unconscious Ideas

Thoughts, memories, and desires not present in the immediate field of awareness but that influence emotions and behavior.

Childhood Conflicts

Psychological struggles experienced during childhood that can significantly influence personality development and behavior.

Behaviorist

A psychologist who studies behavior, emphasizing the external behaviors of people and their reactions on the environment over internal processes.