From Past History, the Scores on a Statistics Test Are

question 109

Multiple Choice

From past history, the scores on a statistics test are normally distributed with a mean of 70% and a
Standard deviation of 5%. To earn an "A" on the test, a student must be in the top 5% of the class.
What should a student score to receive an "A"?

• A) 80.84
• B) 75.49
• C) 78.2
• D) 76.90

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Definitions:

Stimulants

Substances that increase alertness, attention, and energy by elevating the heart rate, blood pressure, and respiration.

Double-Blind Procedure

An experimental procedure in which neither the participants nor the experimenters know who is receiving a particular treatment, used to prevent bias in research results.

Placebo

An inert or non-active treatment given to a participant in an experiment, used to measure the effect of the treatment being tested.

Barbiturates

A class of drugs that act as central nervous system depressants, often used for their sedative and hypnotic properties.