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Explain why some studies include both a control group and a placebo treatment. What additional comparisons are possible if both a control group and a placebo group are included?
Statistics and Probability, Statistics
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Informatics and Financial Applications Background The assignment of a payroll calculator demonstrates Excels ability to automate and present financial calculation information clearly. The ability to build and professiona ...
One hundred twenty-five marine recruits participated in a study to assess the benefits of a strength training program. Each recruit was given a push-up test at the beginning and end of the program. The change in number o ...
Confidence intervals (CI) are one of the simpler forms of inferential statistics. What does the CI represent? And why does our knowledge of the Central Limit Theorem (CLT) and the empirical rule let us understand why the ...
In a sample of 41 temperature readings taken from the freezer of a restaurant, the mean is 29.7 degrees and the standard deviation is 2.7 degrees. What would be the 80% confidence interval for the temperatures in the fre ...
A sample of 175 randomly selected students, found that the proportion of students planning to travel home for thanksgiving is 0.64 What is the standard deviation of the sampling distribution.
A data firm records a large amount of data. Historically, 1.0% of the pages of data recorded by the firm contain errors. If two hundred pages of data are randomly selected? a. What is the probability that six or more pa ...
An aerospace company has submitted bids on two separate federal government defense contracts, AandB . The company feels that it has a 60% chance of winning contract Aand a 30% chance of winning contractB . If it wins co ...
A school newspaper reporter decides to randomly survey 12 students to see if they will attend Tet (Vietnamese New Year) festivities this year. Based on past years, she knows that 24% of students attend Tet festivities. W ...
A representative from your company visited a prison and sampled 500 prisoners in Kailil , concluding that 90 of them are political prisoners. the Test hypothesis, at the 5% significance level, that one third of the priso ...
Describe the theoretical problems of ethics (3), the objectives to solving them.
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