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in this video weamp;#39;re going to use statcrunch to find whatamp;#39;s called a cut off value so weamp;#39;re going to focus on problem number two part c so it tells us that iq scores are normally distributed with the mean of 110 and a standard deviation of 20. part c an individual is considered gifted if his or her iq score is in the top 10 percent thatamp;#39;s the key word there whenever you see something like top 10 percent top 5 percent bottom ten percent you know itamp;#39;s probably going to be a cutoff value type problem find the iq score that separates those who are gifted from those who are not so because itamp;#39;s normal and itamp;#39;s asking us for a cut off value in other words the number that separates the top 10 percent from everyone else weamp;#39;re going to go to stat calculators and then normal then youamp;#39;ll left click on normal so iamp;#39;m going to left click and this great window opens up so we enter the mean which is 110 so 110 and then the s