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5 The cost of electricity x in June for a random sample of 50 one...

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5 The cost of electricity x in June for a random sample of 50 one bedroom apartments in a city in the central portion of New Jersey is summarized by a histogram Complete the following questions Electricity Cost Frequency 15 10 99 120 140 160 180 Utility Charge S 200 220 Note the sample mean is 150 and the sample variance is 1024 a Does the monthly electricity cost seem to have approximately a symmetric distribution YES NO b If x 150 and s 322 find the interval that contains 95 of the data Answer c Did you have to use Chebyshev s Rule to find the answer to b above d If one electricity bill is x 118 what is the corresponding z score Answer e If the minimum monthly bill is 86 and the range is 140 find the z score of the maximum monthly bill Answer f Do you think there are possible outliers in this sample YES NO Why YES NO

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