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A researcher was interested in the emotional effects of music on exam performance. Before their exam, a professor took one group of students into a room in which calming music was played. A different group of students were taken to another room in which new wave hard rock was being played. The students then took the exam and their scores were reported. What type of analysis would be most appropriate?
A. Paired (dependent) t-test
B. Independent (unpaired) t-test
C. Analysis of Variance ANOVA
D. Repeated Measures ANOVA
Be sure the appropriate assumptions and conditions are satisfied before you proceed.
A medical research team studied the ages of 34 patients who had strokes caused by stress. The frequency distribution below summarizes the results. When trying to understand the stroke data, what would be the advantage of looking at a histogram ins..
A 90% confidence interval runs from 65.891 to 70.109 for the mean daily number of credit card applications that are rejected from a computer system and must be handled manually.
What is the standard error of measurement for the test? What range of scores would you expect an individual who made 54 on the test to make on another test of similar difficulty? Assume you want to be 68% accurate in your estimate.
Now we are going to talk about continuous probability distributions. In a continuous probability distribution, the variable can have a value within a range.
Display the data in scatter plot. Calculate the linear correlation coefficient. Use the scatterplot to make a conclusion about the type of correlation.
Suppose Napoleon were using Bayes' theorm to revise his information. To do so, he would have had to make some judgements about P(Prussian and English Join forces |Napoleon Wins) and P(Prussian and English Join forces |Napoleon loses).
At 95% level of confidence, can we conclude that the babies using the Gibbs product gained less weight?
Given CAPM as the benchmark, is either of the two managers over-performing the market? What if you use the Sharpe Ratio as benchmark? Explain the answer carefully.
Jared bets on the number 7 for each of 100 spins of a roulette wheel. Because P(7) = 1/38 he expects to win two or three times. What is the probability that Jared will actually win two or more times?
Temperature in a certain city for the month of June follows a uniform distribution over the interval 61º F to 91º F. What is the probability that a randomly selected June day has a temperature that exceeds 70º F?
What does standard deviation measure? In looking at the standard deviations of the "with fireplace" and "without fireplace" selling prices, one is much larger than the other.
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