A Therapist Has a Goal to Reduce the Mean Number

question 26

Multiple Choice

A therapist has a goal to reduce the mean number of patient symptoms expressed for a particular disorder to two symptoms per day.Following therapy,she determines that the z score for 2 symptoms per day is 0.Assuming the data are normally distributed,did she reach her goal?

• A) No, because the z score indicates 0 improvement.
• B) No, because the z score is not negative (indicating a reduction in symptoms).
• C) Yes; in fact, she actually reduced the mean number of symptoms to 0.
• D) Yes, because a z score of 0 is the average, or mean.

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Definitions:

Retentive On-Delay

A timing function in control systems that starts counting upon receiving an input signal and retains its timing value across power cycles, activating its output after a set delay.

Retentive Timer

A type of PLC timer that retains its value even after the power is turned off or the controlling logic is no longer true.

Nonretentive Timer

A timer in a control system that does not retain its count or state after a power cycle, restarting from zero.