Probability of a randomly selected person


Intelligence tests are designed to provide a normal distribution of IQ scored whith a mean of 100 and a standard deviation of 15.

* What IQ scores are in the highest 5% of all scores?

*What IQ scores are in the lowest 10% of all scores?

What is the probability of a randomly selected person having an IQ score about 80%?

What is the probability of a randomly selected person having an IQ score between 120 and 130

What is the probability of a randomly selected person having an IQ score below 94

What is the probability of a randomly selected person having an IQ score between 74 and 109?

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Basic Statistics: Probability of a randomly selected person
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