The mean of these 20 average scores is 21.33 and the standard deviation is 1.94. Could the 68-95-99.7 Rule be used to give an interval that you would expect to contain approximately the middle 95% of average scores for all of the region's schools? If so, what is that interval? If not, explain why not. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. A. Yes, because a Normal model is appropriate for this situation. The interval is. (Type your answer in interval notation. Type integers or decimals rounded to two decimal places as needed.) B. No, because a Normal model is not appropriate for this situation.

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