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Question: Choose the statement(s) which is/are true of a normal distribution. The graph of a normal distribution is symmetric about the mean. The shape of the graph of a normal distribution is bell-shaped. 99.7% of the data is within 2 standard deviations of the center
The following statements are true of a normal distribution: 1. The graph of a normal distribution is symmetric about the mean. 2. The shape of the graph of a normal distribution is bell-shaped. However, the last statement is incorrect. In a normal distribution, about 68% of the data is within 1 standard deviation of the mean, approximately 95% is within 2 standard deviations, and roughly 99.7% is within 3 standard deviations of the mean.
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