a large public utility wishes to compare the consumption of

a large public utility wishes to compare the consumption of electricity during the summer season for homes in two areas that it services. the following data on monthly electric bills is supplied. test for any difference in the average amount of electricity used ar 5% level of significance . Area 1 sample mean 115 sample stardard deviation 30 sample size 21. Area 2 sample mean 98, sample standard deviation 18, sample size 21

a large public utility wishes to compare the consumption of electricity during the summer season for homes in two areas that it services. the following data on monthly electric bills is supplied. test for any difference in the average amount of electricity used ar 5% level of significance . Area 1 sample mean 115 sample stardard deviation 30 sample size 21. Area 2 sample mean 98, sample standard deviation 18, sample size 21

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