The IQs of Students at an Elementary School Were Measured

question 21

Short Answer

The IQs of students at an Elementary School were measured and found to be normally distributed with a mean of 100 and a standard deviation of 20. Round your answers to four decimal places, if necessary.
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Find the probability that a student selected at random will have an IQ of 140 or higher.
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__________
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Find the probability that a student selected at random will have an IQ of 120 or higher.
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__________
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Find the probability that a student selected at random will have an IQ of between 100 and 120.
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Find the probability that a student selected at random will have an IQ of 90 or less.
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Definitions:

Pain Relief

Methods or treatments used to reduce or alleviate discomfort and pain.

Cultural Rules

Norms and guidelines that govern behavior and attitudes within a specific culture or society.

Pain Perception

The subjective interpretation and experience of pain by an individual, which can be influenced by various psychological and physiological factors.

Perception of Pressure

The sensory experience of interpreting force applied to the skin or body, often related to touch or weight.