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Exаm Questiоn 4 IQ is nоrmаlly distributed with а mean оf 110 points and a standard deviation of 13 points. Kelso’s IQ is 2.1 standard deviations below the mean. What is Kelso’s IQ and is it unusual? Explain how and why or why not. Include any relevant calculations. Find the proportion of people with an IQ of at least 120. Write probability notation in your answer and write the desmos function you used to do the calculation, show your thinking with the provided graph. Round Z-scores to two decimal places. Round your answer to three decimal places. Alfred wants to know the IQ’s of the people who encompass the middle 80% of the population. His solution is below. Describe two errors he made and explain to him how to fix them. Lower limit is and the upper limit is . So 80% of all IQ’s are between 25.8 points and 194.2 points.