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In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of six students were given the exam before and after taking the course. The results are shown below:
Score ScoreStudent Before the Course After the Course
1 83 87
2 89 88
3 93 91
4 77 77
5 86 93
6 79 83
Use ? = 0.1 and test to see if taking the course actually increased scores on the driving exam (perform all six steps of hypothesis testing, including p-values).
The weekly output of a steel mill is a uniformly distributed random variable that lies between 110 and 175 metric tons. Compute the probability that the steel mill will produce more than 150 metric tons next week.
Does drug have significant effect on aggression? Use an alpha level of .05, two tails.
Consider the case where we have n observations, sampled from a binomial pdf (our parameter estimator can therefore be given by X/n). Assume that the margin of error is 6%.
A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative action programs for women and minorities for admissions to colleges and universities.
Scores ranged from 0 to 40 with higher scores reflecting greater computer anxiety. This variable was measured on the interval scale. The researcher analyzed the data using what t test?
What results in your departments seem to be correlated or related to other activities? How could you verify this? Create a null and alternate hypothesis for one of these issues. What are the managerial implications of a correlation between these v..
Differentiate between a point estimate and an interval estimate for a population parameter. What is necessary for an interval estimate to be a confidence interval?
If you had a research problem appropriate for ANOVA and it was based on the results from three samples, what would be the null hypothesis?
Make a decision using the Decision Rule approach at given α = 0.05.
A bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes that the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes.
Using smoothing constant of w = .80, compute the value of exponentially smoothed series in 1983.
Establish a 99% Confidence interval about the difference in the proportion of the town voters and county voters who favor the proposal.
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