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I want to estimate within $10 the mean salary of all graduates who were business majors in college. How many business majors would be needed to estimate the mean salary to within 10 with 95% confidence if the population standard deviation is $200.
A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes.
Using decision tree analysis, decide whether Jay must proceed with his law suit against manufacturer.
In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 81 and a standard deviation of 6. Let x be a random variable that represents a test score.
Calculate the paired sample t statistic for these mood scores and How has the relation between the mean and the median changed? What does this suggest about the distribution of the transformed data?
Using the p- value approach, test the hypotheses at the 5% level of significance.
If a complete failure occurs, calculate the probability that the fault occurred in:
Using this test 80% of Down's syndrome cases can be identified at birth, while 5% of normals are detected as positive. a. What is the sensitivity and specificity of the test?
Compute mean x and standard deviation s of data above. Calculate Ho by using traditional/classical method.
Calculate the difference in the average "clutter" between network and TV.
Describe the circumstances under which you should use ANOVA instead of t tests, and explain why t tests are inappropriate in these circumstances. Find a peer-reviewed article that reflects these circumstances, describe the research conducted (i.e...
What information is provided by the numerical value of the Pearson correlation? For the following scores, compute the Pearson correlation:
Construct a 99% confident interval for the standard deviation of the amount of vitamin B6 per pill.
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