The following are the duration in minutes of a sample of long-distance phone calls made within the Continental United States reported by one long-distance carrier. Relative ime (in Minutes) O but less than 5 but less than 10 0 but less than 15 Frequency 0.37 0.22 0.15

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A:

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A: Given: Meanμ=7

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Q: None

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A: Mean is found out by dividing the sum of all observations by the number of observations.