Year 12 Methods (Unit 3 & 4)
The normal distribution
Solving problems using the normal distribution
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Questions
Question 1
148712
Given that IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
What is the probability that a person chosen at random has an IQ.
i) greater than 125
ii) greater than 120 given that they have an IQ greater than 105?
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