If the Standard Deviation of a Normal Distribution Were Equal

question 46

Multiple Choice

If the standard deviation of a normal distribution were equal to 15 and someone had a raw score of 122, which fell at the 90th percentile, then the mean

• A) must be greater than 122
• B) must be less than 122
• C) must be between 90 and 122
• D) could not be found from the above information

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Definitions:

Insulin

A hormone produced by the pancreas that helps regulate blood glucose levels by facilitating the uptake of glucose by cells.

Adrenal Cortex

The outer portion of the adrenal gland that produces steroid hormones including cortisol and aldosterone.

Glucagon

A hormone produced by the pancreas that raises blood glucose levels, acting as a counter-regulatory hormone to insulin.

Progesterone

A steroid hormone released by the corpus luteum and important in the regulation of reproduction, preparing the uterus for implantation of a fertilized egg and maintaining pregnancy.