Manually statistics
Manually calculate standard error and Z statistic (6 points)
According to the CDC report, the mean life expectancy in the US population is currently (µ) 78.6 years with a standard deviation (σ) of 12. A researcher examined the age of death of 400 people recently recorded in several Arizona hospitals and calculated the mean to be 79.5 years old. He runs a two-tailed Z test with α = .05 to see if Arizona has a significantly different life expectancy compared to the US population. Because the researcher is not predicting a direction, the hypotheses should be non-directional.
Need assignment help for this question?
If you need assistance with writing your essay, we are ready to help you!
OUR PROCESS
Order
Payment
Writing
Delivery
Why Choose Us: Cost-efficiency, Plagiarism free, Money Back Guarantee, On-time Delivery, Total Сonfidentiality, 24/7 Support, 100% originality
10. Calculate standard error
11. Calculate the Z statistic.
12. Determine the critical Z value(s).