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84. The followlng frequency distributlon reports the electricity cost for a sample of 50 two- bedroom apartments In Albuquerque, New Mexico, during the month of May last year. Electricity Cost Frequency $ 80 up to $100 100 up to 120 120 up to 140 140 up to 160 160 up to 180 180 up to 200 3 8 12 16 4 Total 50 a. Estimate the mean cost. b. Estimate the standard devlatlon. c. Use the Emplrlcal Rule to estimate the proportion of costs within two standard devla- tlons of the mean. What are these limlts?

84. The followlng frequency distributlon reports the electricity cost for a sample of 50 two- bedroom apartments In Albuquerque, New Mexico, during the month of May last year. Electricity Cost Frequency $ 80 up to $100 100 up to 120 120 up to 140 140 up to 160 160 up to 180 180 up to 200 3 8 12 16 4 Total 50 a. Estimate the mean cost. b. Estimate the standard devlatlon. c. Use the Emplrlcal Rule to estimate the proportion of costs within two standard devla- tlons of the mean. What are these limlts?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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84. The following frequency distrilbutlon reports the electricity cost for a sample of 50 two- bedroom apartments In Albuquerque, New Mexlco, during the month of May last year. Electricity Cost Frequency $ 80 up to $100 100 up to 120 120 up to 140 140 up to 160 160 up to 180 180 up to 200 3 8 12 16 7 4 Total 50 a. Estimate the mean cost. b. Estimate the standard devlatlon. c. Use the Emplrical Rule to estimate the proportion of costs within two standard devla- tlons of the mean. What are these limits?
Transcribed Image Text:84. The following frequency distrilbutlon reports the electricity cost for a sample of 50 two- bedroom apartments In Albuquerque, New Mexlco, during the month of May last year. Electricity Cost Frequency $ 80 up to $100 100 up to 120 120 up to 140 140 up to 160 160 up to 180 180 up to 200 3 8 12 16 7 4 Total 50 a. Estimate the mean cost. b. Estimate the standard devlatlon. c. Use the Emplrical Rule to estimate the proportion of costs within two standard devla- tlons of the mean. What are these limits?
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