An electric company reported the annual number of kilowatt hours expended by various home appliances. It is claimed that a dishwasher expends an average of 46 kilowatt hours per year. If a random sample of 12 homes indicates that dishwashers expend an average of 42-kilowatt hours per year with a standard deviation of 11.9 kilowatt hours, does this suggest at a 0.05 significance level that dishwashers expend, on average, less than 46 kilowatt hours annually? Assume the population of kilowatt hours to be normal
An electric company reported the annual number of kilowatt hours expended by various home appliances. It is claimed that a dishwasher expends an average of 46 kilowatt hours per year. If a random sample of 12 homes indicates that dishwashers expend an average of 42-kilowatt hours per year with a standard deviation of 11.9 kilowatt hours, does this suggest at a 0.05 significance level that dishwashers expend, on average, less than 46 kilowatt hours annually? Assume the population of kilowatt hours to be normal
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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An electric company reported the annual number of kilowatt hours expended by
various home appliances. It is claimed that a dishwasher expends an average of 46 kilowatt hours per
year. If a random sample of 12 homes indicates that dishwashers expend an average of 42-kilowatt
hours per year with a standard deviation of 11.9 kilowatt hours, does this suggest at a 0.05 significance
level that dishwashers expend, on average, less than 46 kilowatt hours annually? Assume the population
of kilowatt hours to be normal
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