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4. Determine the area under the standard normal curve that lies between -2.5 and -2 5. A variable is normallv distributed with a mean 58 and standard deviation 10. Find the percentage of all possible values of the variable that a} Lies between T3 and 80 b] Are at least T5 1:} Are at most 90 6. For the following Population data 2,3,5,5,?,3 find: The mean when n=2