Question: The Federal Reserve System publishes data on family income based
The Federal Reserve System publishes data on family income based on its Survey of Consumer Finances. When the head of the household has a college degree, the mean before-tax family income is $85,200. Suppose that 60% of the before-tax family incomes when the head of the household has a college degree are between $75,600 and $94,800 and that these incomes are normally distributed. What is the standard deviation of before-tax family incomes when the head of the household has a college degree?
Answer to relevant QuestionsAccording to the Polk Company, a survey of households using the Internet in buying or leasing cars reported that 81% were seeking information about prices. In addition, 44% were seeking information about products offered. ...In a recent year, the average daily circulation of the Wall Street Journal was 1,717,000.Suppose the standard deviation is 50,940. Assume the paper’s daily circulation is normally distributed. On what percentage of days ...Develop a frame for the population of each of the following research projects.a. Measuring the job satisfaction of all union employees in a companyb. Conducting a telephone survey in Utica, New York, to determine the level ...sA random sample of size 81 is drawn from a population with a standard deviation of 12.If only 18% of the time a sample mean greater than 300 is obtained, what is the mean of the population?If a population proportion is .28 and if the sample size is 140, 30% of the time the sample proportion will be less than what value if you are taking random samples?
Post your question