Could use some help, thanks. 2. Chronic lung disease is one of the primary long-

Question

Could use some help, thanks.

2. Chronic lung disease is one of the primary long-term complications among premature infants. A research hypothesis suggested that the use of inhaled nitric oxide would decrease the incidence of chronic lung disease and death in premature infants. To test this hypothesis, a randomized, double-blind, placebo-controlled study of inhaled nitric oxide versus placebo in premature infants undergoing mechanical ventilation was designed and conducted. A total of 105 infants were assigned to the treatment group, and 102 infants were assigned to the control group. Results for the primary endpoint - death and chronic lung disease- are shown in the talbe below. Is there statistically significant evidence that nitric oxide is reducing the incidence of death or chronic lung disease among premature infants undergoing mechanical ventilation?

Explanation / Answer

Ho: no reducing

Ha: reducing

The test statisitc is

chisquare = 4.82

df=1

p-value= 0.0281

Assume a=0.05

Since the p-value is less than 0.05, we reject Ho.

So we can conclude that there is statistically significant evidence that nitric oxide is reducing the incidence of death

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