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Life expectancies for men and women were measured by country. It was found that the average male life expectancy was 71.8 years with an SD of 7 years, and that the average female life expectancy was 77.4 with an SD of 7.3 years. Moreover, the correlation between male and female life expectancies was found to be 0.95. Use this information to estimate female life expectancy in a country where the male life expectancy is 62.8 years.
Recognize and examine the research question which applies to your organization. Create a 350- to 700-word milestone. Select the organization with which your team is familiar.
Calculate the sample mean and sample standard deviation.
A video rental store has two video cameras available for customers to rent. Historically, demand for cameras has followed this distribution:
Group 2 data [ 141, 139, 172, 131, 150, 125. Assume normal distribution, with equal variance in the two groups and conclusion for a=0.05.
In a sample of 49 adolescents who served as the subjects in an immunologic study, one variable of interest was the diameter of skin test reaction to an antigen.
Create a 99 percent confidence interval for difference in means between Line B and Line C.
Report the test statistic and p-value. What is your decision and conclusion? State any assumptions you have made. Are these assumptions satisfied with these data?
question 1 in 1999 lehman brothers estimated that 48 of its investment bank traders took diverse forms of soft drugs.
At the bottom of each model write the role that each variable plays in the model (i.e. dependent variable (DV), independent variable (IV), moderator, and mediator).
question records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed
The sample mean was $22,098 and the standard deviation was $6050. Is there evidence at the 1% significance level that the cost of attendance has increased?
A linear regression equation is computed for a sample of n = 18 pairs of X and Y scores. For the analysis of regression testing the significance of the equation, what are the df values for the F-ratio?
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