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Design a study that would apply the Pearson correlation coefficient as an appropriate statistic.
Sales of a product are influenced by the salesperson's level of education and gender, as well as consumer income, ethnicity, and wealth.
suppose that the proportion of fatal single-car accidents that involve alcohol consumption on the part of the driver is
If 12 drivers are randomly selected, what is the probability of getting 3 or more who were involved in a car accident last year?
For men driving the old car, testosterone levels will decrease less in men who drive the old car on the highway.
Teenage pregnancies. The U.S. National Center for Health Statistics reports for 2006 the distribution of teenage pregnancies by age range and ethnicity of the mother.
The statistics showed that students studied an average of 20 hours per week with a standard deviation of 10 hours. What is the probability that a sample mean would exceed 20 hours per week?
The correlation coefficient between them is 0.4. Your portfolio should have a return of 15%. How many shares of each company should you buy? Find the standard deviation of this portfolio's returns
A sample of 25 units yields a sample mean of 14 and a sample standard deviation of 4.32. Do we have statistical significance if our alpha value is .05?
a binomial probability experiment is conducted with the given parameters. compute the probability of x successes in the
Compare the North and the South in 1860 and then again in 1864. Why did the North win the war?
Use a statistical software package to construct a normal probability plot of the tensile ultimate-strength data given in Exercise 13 of Chapter 1, and comment
experience has shown that 60 of the time a strike by union workers is settled within two-weeks 55 of the time the union
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