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Please state the steps used to perform a hypothesis test on the coefficient of correlation and provide a detailed example. Details are greatly appreciated!
Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
How to calculate expected difference between the samples means, and how does larger variability affect the size of the standard error for the sample mean difference?
According to the U.S. Census Bureau, the mean household income in the United States in 2000 was $63,091 and the median household income was $50,054.
Test the hypothesis that there is no difference in the mean scores of Exam 1 and Exam 2 against the alternative that the average is greater for the second exam.
Test whether race and NATFAE are independent (α = 0.05). What do you conclude?
Suppose you have the experiment of flipping a coin three times.
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience (to 2 decimals)?
Assume that p-value was 0.07, would you reject null hypothesis of equal mean rates for a Type- I error rate of 5%? (Circle one).
Construct a 95% confidence interval estimate for the population proportion of adults who report that e-mails are easy to misinterpret.
If a random sample of 10 people found that 9 were pro-life (i.e., 90%), while another random sample of 1000 people from the same population found that 550 were pro-life (i.e. 55%), which would you find to be more significant? Why?
Identify the type of sampling (random, systematic, convenience, stratified, cluster) used when a sample of people who smoke is obtained as described below.
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