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Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample half the size. Indicate the resulting alpha and beta. Present an argument that your study is worth doing with the smaller sample.
Way around B&W plots
a) Conduct a crosstabs analysis to examine the proportion of female high school students who take advanced math courses is different for different levels of the parent variable.
Estimate the population mean, and the population standard deviation is unknown, we are hit with a "double whammy" when it comes to the margin of error. Explain what the "double whammy" is and why it occurs. (Hint: Consider the sources of variation in..
A person estimates that his commute to work will most likely take 50 minutes. However, it could talk as long as 1 hour and 35 minutes worst case, or as little as 35 minutes best case. What is the approximate standard deviation based on the ab..
An average of 8.5 cars are sold per 10-hour day on Saturdays and Sundays in January and February. A) On the first Saturday in February, the dealership opens at 9am. Find the probability that the time until the first sale is more than 2 hours...
Run the Wilcoxon rank-sum test to show whether there is a statistically significant difference between the mortality rates of children under the age of five years of the regions
Independent-Samples T-Test Computations, You obtain the data shown below for 30 girls with anorexia who were treated with psychodynamic therapy. These values can be interpreted as described in Week 6: Assignment 2.
Sample sizes and standard deviations from the PROC TTEST printout and calculate the pooled estimate of variance
A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches.
if mouse weights are normally distributed with a mean weight of 23 and SD of 4. With 10 mice per box, what weight should they use so that no more than 8% of the boxes will have an average mouse weight below that weight?
Study whether systolic blood pressure varied by time
To display the distribution of "countries of origin" for cars in a USCB parking lot, which type of graph could be appropriate?
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