Question

Question 3

Sleep apnea is a disorder in which there are pauses in breathing during sleep. People with this condition must wake up frequently to breathe. In a sample of 424 people aged 65 and over, 128 of them had sleep apnea. What is the lower bound for the 90% confidence interval for the proportion of those aged 65 and over who have sleep apnea.

Round to three decimal places (for example: 0.419). Write only a number as your answer.

Question 4

According to the U.S. Census Bureau, 43% of men who worked at home were college graduates. In a sample of 547 women who worked at home, 177 were college graduates. What is the upper bound for the 99% confidence interval for the proportion of women who work at home who are college graduates?

Round to three decimal places (for example: 0.419). Write only a number as your answer.

Question 5

The Nielsen Company surveyed 259 owners of Android phones and found that 200 of them planned to get another Android as their next phone. What is the lower bound for the 95% confidence interval for the proportion of Android users who plan to get another Android?

Round to three decimal places (for example: 0.419). Write only a number as your answer.

Answer 1