36-225 – Handout for Lecture # 23October 18, 20101. Suppose scores on the verbal or math portion of the SAT from a partic-ular year are approximately normally distributed with meanμ= 500and standard deviationσ= 100. What is the proportion of studentswho scored above 650 that year (or: what is the probability that arandomly chosen student from those taking the exam that year scoredabove 650?)2. A life insurance company is interested in the number of claims that itwill receive on a particular block of life insurance policies in the comingyear. All the policies in the block are written on lives of people who arecurrently age 79. There are presently 1000 active policies in the block.(None of the policies in the block are written on more than one life, and
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