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There are four conditions/requirements that must be met in order to perform simple linear regression. For each of the conditions below, choose the technique that should be used to determine whether or not that the condition is met.(Each answer may be used once, more than once, or not at all.)
The probability distribution of ε is normal------?
The mean of the distribution of ε is 0 - or that E(ε)=0------?
A. Create a scatterplot of x vs. y
B. Plot residuals over time
C. Plot a histogram of the residuals
D. Plot residuals vs. y-hat
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
What is critical z-value which corresponds to confidence level of 88%.
Rob Johnson is a product manager at Diamond Chemicals, which is considering whether to launch a new product line that will require it to build a new facility.
ANOVA is a powerful statistical test. How does ANOVA differ from other parametric tests? What are the conditions that must be met to use a one-way ANOVA?
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?
The critical F value with 6 numerator and 60 denominator degrees of freedom at α = .05 is:
Is there evidence to suggest that the process average differs from the target value?
Use the binomial distribution in the Data Analysis add - in to simulate the distribution of men and women among the next ten arrivals at an emergency room, assuming that, on average, six people out of ten who arrive are men.
A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on the risk of cardiovascular disease.
How would you go about studying a nonlinear or curvilinear relationship between two variables using contingency tables and chi-square tests? Provide examples from you own professional experience.
Investigate the comparative pros and cons of the mean and the median. Find examples where the mean is more appropriate than the median and vice-versa. Discuss the locations of the mean, median and mode for a normal, left-skewed and right-skewed di..
Consider the following age data, which is the result of selecting a random sample of 20 United Airlines pilots.
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