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Question 3. A study suggested that hospital CEOs in the US have an average age of ?=57 years old (?=0.9 years old). The group of 7 hospital CEOs claims that their average age of 59 years old is significantly older than the US average. Use the five steps process to test the hypothesis and explain your result at significant level=0.01. Question 4. Before conducting a power calculation for a one-sample z-test, what statistical information do you need to know? Provide the symbols and definitions (Think about the formula to calculate power, there are six things you need to know). Question 5. Suppose the average weight of women in the US is ?=155 lbs with ?=35 lbs. If we proposed the weight should be 165 lbs, how large a sample do we need to have to detect the proposed difference in weight with 80% power and ?= 0.05 (one-sided)?

          Question 3. A study suggested that hospital CEOs in the US have an average age of ?=57 years old (?=0.9 years old). The group of 7 hospital CEOs claims that their average age of 59 years old is significantly older than the US average. Use the five steps process to test the hypothesis and explain your result at significant level=0.01.
Question 4. Before conducting a power calculation for a one-sample z-test, what statistical information do you need to know? Provide the symbols and definitions (Think about the formula to calculate power, there are six things you need to know).
Question 5. Suppose the average weight of women in the US is ?=155 lbs with ?=35 lbs. If we proposed the weight should be 165 lbs, how large a sample do we need to have to detect the proposed difference in weight with 80% power and ?= 0.05 (one-sided)?

Question 3. A study suggested that hospital CEOs in the US have an average age of ?=57 years old (?=0.9 years old). The group of 7 hospital CEOs claims that their average age of 59 years old is significantly older than the US average. Use the five steps process to test the hypothesis and explain your result at significant level=0.01.
Question 4. Before conducting a power calculation for a one-sample z-test, what statistical information do you need to know? Provide the symbols and definitions (Think about the formula to calculate power, there are six things you need to know).
Question 5. Suppose the average weight of women in the US is ?=155 lbs with ?=35 lbs. If we proposed the weight should be 165 lbs, how large a sample do we need to have to detect the proposed difference in weight with 80% power and ?= 0.05 (one-sided)?

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