the electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kwh per day. they would like the estimate to have a maximum error of 0.1 kwh. a previous study found that for an average family the variance is 5.76 kwh and the mean is 16.2 kwh per day. if they are using a 80% level of confidence, how large of a sample is required to estimate the mean usage of electricity?
Answers: 2
SAT, 26.06.2019 05:30
Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.
Answers: 1
SAT, 26.06.2019 05:30
In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers
Answers: 1
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Cartels control the production and pricing of goods mainly through a) the elimination of competition. b) the cooperation of their members. c) the limitation of price controls. d) the manipulation of government pressure.
Answers: 1
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Sweater originally priced at $65 is on sale for 15% off.you also have a coupon that takes another $10 off.what percent of the original price do you pay?
Answers: 1
the electric cooperative needs to know the mean household usage of electricity by its non-commercial...
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