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Given the Life expectancy data for the countries of the E.U., can we conclude that the mean Life Expectancy in the U.S. is greater than the mean Life expectancy in the E.U.?
Bring to mind a real-world situation or problem that could be addressed using a single-sample t test.
For this situation or problem:
Clearly identify the independent and dependent variables you would study.
Generate the statistical null and alternative hypotheses.
Describe what information the effect size would tell you that the probability value would not.
Using realistic numbers for values of degrees of freedom, sample size, and t statistic, report hypothetical results in a few sentences using correct APA format.
Compute the mean and standard deviation of the scores and use these for the calculations below. Show your calculations on the back of his page.
Using the sample obtained, draw a histogram and calculate mean and variance for 1000 sampled values for random variable Y = X2.
Calculate the mean and standard deviation for this set of data. Convert your answer back to dollars and cents and give the correlation value between number of beers consumed and BAC?
At 5% level of significance, is true mean smaller than specification? Clearly mention your hypotheses and decision rule.
A four-year financial project is forecast to have net cash inflows of $20,000; $25,000; $30,000; and $50,000 in the next four years. It will cost $75,000 to implement the project
A random sample of 300 beer drinkers is selected and each member of the sample is asked to choose between two brands of beers: Brand A and Brand B. The results are that 165 prefer Brand A and 135 prefer Brand B.
Sketch a graph and shade the area of interest. SCores on a standardized exam are normally distributed with u = 60 and o = 5.
Draw a tree diagram representing the data. What is the probability that a vehicle stolen in this city will never be recovered?
The population of IQ scores forms a normal distribution with a mean of µ = 100 and a standard deviation of o = 15. What is the probability of obtaining a sample mean greater than M = 105.
A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 12 hours, with a standard deviation of 3.0 hours.
Find the sample size for the 95% confidence interval used to estimate the population proportion.
To find out the efficiency of the current ticket operation, Mike wishes to examine several queue operating features.
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