The Lengths of Pregnancies of Humans Are Normally Distributed with a Mean

question 95

Multiple Choice

The lengths of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. Find the probability of a pregnancy lasting less than 250 days.

• A)0.1151
• B)0.1591
• C)0.0606
• D)0.0066

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Definitions:

Counterbalanced

A method used in experiments to minimize the effects of order in the presentation of stimuli by varying the sequence among participants.

Conditions Presentation

The method or order in which experimental conditions are presented to participants in a study.

Latin Square

A statistical design used in experiments to control for two confounding variables, arranging treatments in a square matrix.

Order Effects

Potential changes in participants' responses due to the sequence in which experimental materials are presented.