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Answer on Statistics and Probability Question for jessica

Question #18486
. You are advising the Ontario government on how large a sample size should be generated to evaluate the “smart meters” program. The sample should be large enough so that there is at least a 97% chance that the sample proportion of families who say they “work hard to conserve electricity at home” is within .03 of the true population proportion AND that the sample mean for monthly family consumption of kilowatt hours (KWH) is within 20 KWS of the true population mean.

a. The only information available comes from a 2010 survey of 1,500 Ontario families, which indicated that monthly KWH for respondent families varied from 20 to 1350 KWH. [10]

b. How would your results change, if you knew that before the smart meter program only 20% of Ontario families attempted to conserve electricity at home. [6]
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