Question: Three independent random samples are collected and three sample means
Three independent random samples are collected, and three sample means are computed. The total size of the combined sample is 124. How many degrees of freedom are associated with the deviations from the sample means in the combined data set? Explain.
Answer to relevant QuestionsUse a random number table to find identification numbers of elements to be used in a random sample of size n = 25 from a population of 950 elements. The Toyota Prius uses both gasoline and electric power. Toyota claims its mileage per gallon is 52. A random sample of 40 cars is taken and each sampled car is tested for its fuel efficiency. Assuming that 52 miles per ...British Petroleum has recently been investing in oil fields in the former Soviet Union.4 Before deciding whether to buy an oilfield, the company wants to estimate the number of barrels of oil that the oilfield can supply. ...A telephone company wants to estimate the average length of long-distance calls during weekends. A random sample of 50 calls gives a mean x-bar = 14.5 minutes and standard deviation s = 5.6 minutes. Give a 95% confidence ...A transportation company wants to estimate the average length of time goods are in transit across the country. A random sample of 20 shipments gives x-bar = 2.6 days and s = 0.4 day. Give a 99% confidence interval for the ...
Post your question