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4 The time to complete an exam is approximately Normal with a mean of 55 minutes and a standard deviation of 8 minutes. The

4 The time to complete an exam is approximately Normal with a mean of 55 minutes and a standard deviation of 8 minutes. The bell curve below represents the distribution for testing times. The scale on the horizontal axis is equal to the standard deviation. Fill in the indicated boxes. =55 a=8 -30 H-20 -0 H- + +20 +30 74

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