Question

3) Obstructive sleep apnea is a sleep disorder that causes a person to stop breathing momentarily and then awaken briefly. These sleep interruptions, which may occur hundreds of times in a night, can drastically reduce the quality of rest and fatigue during waking hours. Researchers at Stanford University randomly chose 159 commercial truck drivers found 124 of them suffered from obstructive sleep apnea (Chest, May 1995). Sleep rescarchers theorize that 25% of the general population suffers from obstructive sleep apnea. Does this study provide sufficient evidence to conclude that this percentage differs for commercial drivers? Let the significance level be 0.02. (Note: You may let OSA represent obstructive sleep apnea in your explanation) (a) State the parameter, the null and alternative hypotheses ) Write the conditions (c) Complete all the steps for the test statistie and p-value. d) Decision (e) Conclusion

Answer 1