Consider a sample of 22 households that used an average of 346.2 gallons of water per...
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 1.7 gallons. The mean water usage per family was found to be 15.8 gallons per day for a sample of 249 families. Construct the 80% confidence interval for the mean usage of water. Round your answers to one decimal place.
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 1.6 gallons. The mean water usage per family was found to be 14.6 gallons per day for a sample of 164 families. Construct the 80% confidence interval for the mean usage of water. Round your answers to one decimal place.
(2 pts) The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 2.3 gallons. The mean water usage per family was found to be 18.5 gallons per day for a sample of 717 families. Construct the 80% confidence interval for the mean usage of water. Round your answers to one decimal place. Answer: Lower endpoint: Upper endpoint:
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 1.2 gallons. The mean water usage per family was found to be 16.5 gallons per day for a sample of 1075 families. Construct the 99%confidence interval for the mean usage of water. Round your answers to one decimal place.
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 1.9 gallons. The mean water usage per family was found to be 16.5 gallons per day for a sample of 1000 families. Construct the 98% confidence interval for the mean usage of water. Round your answers to one decimal place. Answer low to Enter) 1 Point m Tables Keypad...
A test on a random sample of 50 water balloons yielded a sample average weight of 1.2 pounds. Prior studies have shown that the population standard deviation is 0.2 pounds. Assume that water balloon weight is normally distributed. Construct a 95% confidence interval of the population mean?
hi there, having trouble with stats homework In a random sample of 22 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval fo the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is ( 29.4, 33.6) (Round to one decimal place as...
3. Consider a normally distributed population with a standard deviation of 36. If a random sample of size 49 produces a sample mean of 150, construct an 80% confidence interval for the true mean of the population.
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. they would like to estimate to have a maximum error of 0.14 gallons. a previous study found that for an average family the standard deviation is 2 gallons and the mean is 16 gallons per day. If they are using a 95% level of confidence, how large of a sample is required to estimate the mean...
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. They would like the estimate to have a maximum error of 0.14 gallons. A previous study found that for an average family the standard deviation is 1.9 gallons and the mean is 16.7 gallons per day. If they are using a 98% level of confidence, how large of a sample is required to estimate the mean...