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What is standard deviation and how is it measured? What does it tell us about a data set? How can it be used in the research process?
Conduct a matched pairs t-test to see if the differences in locations is significant - The air in poultry-processing plants often contains fungus spores.
A simple random sample of 64 observations was taken from a large population. The sample mean and the standard deviation were determined to be 320 and 120 respectively. The standard error of the mean is?
The central district students failed. Develop a probability tree showing all marginal, conditional and joint probabilities. Develop a joint probability table.
Calculate a 95% confidence interval for the difference in the proportions of birth defects when the contaminated well was in use and when the contaminated well was not in use.
Songs on an iPod David's iPod has about 10,000 songs. The distribution of the play times for these songs is heavily skewed to the right with a mean of 225.
For each of the following characteristics of an individual, indicate whether the variable is categorical or quantitative.- Length of forearm from elbow to wrist (in centimeters).- Whether or not the person has ever been the victim of a crime.
Using an example from a hospital, create a mock data set for two specific variables of importance within hospital (minimum of 20). The data may be used for quality measures, patient inputs, demographics, financial data, etc.
Consider a machine with exponential reliability model. Assume that the breakdown rate is 1 and the repair rate is 2.
A recent experiment byAlisherandPhylis investigated the relationship between smoking and urinary incontinence.
What is the reference value? Does it come from the sample data? Is it known or unknown?
You decide to change the ringtones for your cell phone by choosing 2 from a list of the 10 most popular ringtones.17 Here is the list:
A venture capitalist, willing to invest $1,000,000, has three investments to choose from. The first investment, a software company, has a 10% chance.
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