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1) Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
2) What is blocking and how does it reduce "noise"? What is a disadvantage of blocking?
3) What is a factor? How can the use of factors benefit a design?
4) Explain main effects and interaction effects.
5) How does a covariate reduce noise?
6) Describe and explain three trade-offs present in experiments.
Find the probability of committing a type I error.
In past, mean processing time was 45 days. At 0.05 level of significance, is there evidence that mean processing time has changed from 45 days?
A frequency polygon: does not depend on one variable. True-False
Sampling distributions. Given a normal distribution with μ = 50 and standard deviation σ = 9, if a sample of n = 100 is selected.
Shall we reject the hypothesis that the population mean is 6.0? Interpret the result.
Find a 90% confidence interval for the mean amount left by all groups.
One approach would be to contact every psychology graduate student you know and ask them to fill out a questionnaire about it.
Run a multiple regression and interpret all the findings, R 2 , F, IV coefficients, and the intercept. Then in paragraph format, identify and report the following:
The researcher was interested in how well what he/she manipulated predicts how happy subjects feel at the end of the procedure. Using the data below, calculate the regression constants and present the equation for the regression line.
A company that has 200 employees chooses a committee of 15 to represent . When the committee is formed, none of the 56 minority employees are selected. if the committee is chosen randomly. What is the probability that it contains no minorities.
The time required to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions. a) What is the probability of completing the..
What is the numerical value of the sample proportion p^ ? The P-value is the probability of what event?
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