A Professor Wants to Determine If the Grades in Her

question 30

Multiple Choice

A professor wants to determine if the grades in her introductory criminal justice class were higher than the rest of the school. With a total of 101 students in her class, they had a mean exam grade of 87, and a standard deviation of 3. She was not able to obtain the standard deviation for the other introductory classes, but the mean grade of all classes was 74. Which of the following would be the test statistic used, and what is the correct answer?

• A) t = 0.39
• B) t = 0.43
• C) Z = 0.39
• D) Z = 0.43

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Definitions:

Herbal Supplement

Products made from botanicals, or plants, that are used to treat diseases or to maintain health.

Prescription Medication

Drugs that legally require a medical prescription to be dispensed, usually because of their potential side effects or risk of misuse.

Organic

Relating to or derived from living matter, and in agriculture, produced without the use of chemical fertilizers, pesticides, or other artificial agents.

Valerian Root

An herb commonly used for treating insomnia, anxiety, and other nervous system disorders due to its sedative properties.