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How do you calculate a Z-score with a two-sided specification limit? What is the DPMO?
I have a lower spec limit of -0.008 and an uppers spec limit of 0.008. The mean of the data is -0.00306 and standard deviation is 0.003642. What is the z-score and DPMO
In hypothesis testing, the level of significance is? When would you use a t test and when would you use an f test ? You are interested in the assumption that adult students earn better grades than traditional students.
The x and the y variable in the table below are correlated. Determine the 'R' value, and then determine the regression equation.
City government has collected the following data on annual sales tax collections and new car registrations: Determine the least squares regression equation.
Define correlation. Then give an example of a misleading correlation and an example of a meaningful correlation. With this describe the relationship between correlation and causation.
The repair fails in 14%, and both infection and failure occur together in 1%. What percent of these operations succeed and are free from infection?
The main purpose of this exercise is to check your understanding of significance level, p-values and power .
Find a 95 percent confidence interval for the population mean concentration of uric acid in this patients blood. The concentration of uric acid in this patient's blood.
Playbill magazine reported that the mean annual household income of it's readers is $219,155. Assume this estimate of the mean annual household is based on a sample of 91 house-holds and based on past studies,
How many packages should be sampled in order to be 90% confident of being within 0.9% of the actual population percentage delivered damaged.
A researcher is estmating influence of treatment using sample selected from normally distributed population with mean of µ = 80 and standard deviation of σ = 20. Calculate power of test if researcher uses sample of n = 25 individuals.
Pretests, posttests and threats to internal validity and please discuss all threats to internal validity.
The mean of a standard normal probability distribution.
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