Question: Pay your taxes Among all the state income tax forms
Pay your taxes: Among all the state income tax forms filed in a particular state, the mean income tax paid was p = $2000 and the standard deviation was a = $500. As part of a study of the impact of a new tax law, a sample of 80 income tax returns is examined. Would it be unusual for the sample mean of these 80 returns to be greater than $2150?
Answer to relevant QuestionsSafe delivery: A certain delivery truck can safely carry a load of 3400 pounds. The cartons that will be loaded onto the truck have a mean weight of 80 pounds with a standard deviation of 20 pounds. Forty cartons are loaded ...Describe the effect, if any. that the size of a sample has in assessing the normality of a population. Build more parking? A survey is to be conducted in which a random sample of residents in a certain city will be asked whether they favor or oppose the building of a new parking structure downtown. How many residents should ...More repairs: A sample a component showed the following costs: 93 97 27 79 81 87 a. Construct a 90% confidence interval for the mean cost of a repair for this type of component. b. Is there any evidence to suggest that this ...Construct a 95% confidence interval for the mean level of each pollutant for the Year1. 3. Is it reasonable to conclude that the mean levels in Year 1 were lower than the baseline levels for some or all of the pollutants? ...
Post your question