practice928 - supported by 65% of the voters. An NGO hires...

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EEP 118 / IAS 118 - Practice exercises Tuesday September28, 2010 Exercises from previous years’ midterms 2008 #1. (5 points) You conduct a survey among 400 residents of your city about their electricity consumption. The results show electricity consumption per household to vary from 5,500 kWh to 60,000 kWh with mean value 10,656 kWh and standard deviation 4,200 kWh. Construct a 95% confidence interval for the average electricity consumption per household in your city. 2007 #6. (5 points) Suppose a military dictator in an unnamed country holds a vote and claims that he was
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Unformatted text preview: supported by 65% of the voters. An NGO hires you to investigate the validity of the dictators claim. You draw a random sample of 200 voters and find that 115 people actually voted yes. Based on your own sample, construct a 95% confidence interval for the true support for the dictator in the population. What do you conclude on the probable honesty of the dictators claim?...
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