q4 a normal distribution has a mean of 20 and a standard deviation of
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Q.4) A normal distribution has a mean of 20 and a standard deviation of 2. Based on this information, answer the following questions(Show your working): 1. What is the probability
a score will lie between 16 and 24? 2. What is the probability a score will be less than 20? 3. What is the probability of score being more than 18?