Mathematics, 10.03.2020 03:01, jordanmartinezacierr
The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day. Assume that the population standard deviation is 2.4 kWh. The mean electricity usage per family was found to be 17.5 kWh per day for a sample of 796 families. Construct the 90% confidence interval for the mean usage of electricity. Round your answers to one decimal place.
Answers: 3
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Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?
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