QUESTION 9 5 points Save Answer The average FEV (Forced Expiratory Volume) for a

Question

QUESTION 9 5 points Save Answer The average FEV (Forced Expiratory Volume) for adult males 20 to 49 years of age is know to be 3.0 liters You randomly sample 60 male construction workers exposed to high levels of construction dust in that same age range and wish to determine if the mean FEV for construction workers exposed to dust is different than the general male population of the same age using the data set Pulmonary Fuction Data·sav (or Pulmonary Fuction Data-xlsx you wish to test this hypothesis (alpha = 0.05) Your null hypothesis is u all males = u construction workers u all males >= u construction workers u all males-= u construction workers u all males is greater than u construction workers QUESTION 10 5 points Save Answer Using the data set Pulmonary Fuction Data·sav (or Pulmonary Fuction Data-xlsx you wish to test the above hypothesis (alpha = 0.05) Your alternative hypothesis is O u all males u construction workers u all males >= u construction workers u all males-= u construction workers O u all males is greater than u construction workers QUESTION 11 5 points Save Answer Using the FEV data above Based on the sample size N=63 what critical value of t you would need to exceed to reject the null hypothesis with alpha error = 0.05?

Explanation / Answer

9.Null hypothesis is : u all males = u construction workers, since here we want to check the equality of the mean FEV for construction workers and that of general male population.

10. Alternative hypothesis is : u all males =/= u construction workers, by the same explanation.

11. Critical value : t n-1; 0.05/2 = t62;0.025 = 1.998972

12. Calculated value of T = 2.503947, from the single sample t-test.

13. True, since calculated T > Critical value.

14. True, same explanation.

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