According to the U.S. Bureau of Labor Statistics, all workers in America who had a bachelors degree
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According to the U.S. Bureau of Labor Statistics, all workers in America who had a bachelor’s degree and were employed earned an average of $1224 a week in 2014. A recent sample of 400 American workers who have a bachelor’s degree showed that they earn an average of $1260 per week. Suppose that the population standard deviation of such earnings is $160.
a. Find the p-value for the test of hypothesis with the alternative hypothesis that the current mean weekly earning of American workers who have a bachelor’s degree is higher than $1224. Will you reject the null hypothesis at α = .025?
b. Test the hypothesis of part a using the critical-value approach and α = .025.
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a Step 1 H 0 1224 H 1 1224 Step 2 Since n 30 and is known use the normal distribution Step 3 b S...View the full answer
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