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You want to compare the effects of two different cold medicines on reaction time. Suppose you measure the decrease in reaction times for one group of participants who take one capsule of drug A, and you do the same for a different group of participants who take drug B. The results areA: 1.96,2.24,1.71,2.41,1.62,1.93B: 2.11,2.43,2.07,2.71,2.50,2.84,2.88.
Compare these two groups with the Wilcoxon-Mann-Whitney test using α = .05. What is your estimate of the probability that a randomly sampled subject receiving drug A will have less of a reduction in reaction time than a randomly sampled subject receiving drug B.
the amount of time spent watching television or playing video games is considered a significant factor on predicting
a sample of 15 recent college graduates found that starting salaries for attorneys in new york city had a mean of
Four movies are randomly selected. Their lenghts were 110, 96, 125, and 136 minutes. Find a 95% confidence interval of the average of the lenghs of the movie.
Perform exploratory data analysis on CreativityPre and CreativityPost. Using SPSS, calculate the mean and standard deviation of these two variables.
the t distribution has more area in the tails and less in the center than does the standard normal
We select a random sample of 25 observations from a normally distributed population with an unknown population variance. The computed test statistic for a right tail, greater than, hypothesis test is t=1.55.
Suppose an advertising agency is conducting a survey concerning the effectiveness of commercials during the Super Bowl.
The random variable X is the distribution of siblings of a student selected at random from a particular secondary school. Its probability distribution is given in the table.
Discuss the limitation of the expected value approach to assessing the risks of taking on the franchise. What other factors should be considered by Ariba Ltd?
In order to satisfy governmental regulations, the institution wishes to determine if gender has an impact on approval time. What is the model now? What hypothesis would you test to establish no impact of gender?
1. Getting angry at other drivers. Refer to Exercise 8.14. The same Pew Poll found that 38% of the respondents "shouted, cursed or made gestures to other drivers" in the last year.
In grading eggs into small, medium and large, Margi farms packs the eggs that weigh more than 4.25 ounces in packages marked " large" and the eggs that weigh less than 2.45 ounces in packages marked " small" the remainder are packed in packages ma..
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