Sleep apnea: 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 422 people aged 65 and over, 116 of them had sleep apnea. (a) Find a point estimate for the population proportion of those aged 65 and over who have sleep apnea. Round the answer to at least three decimal places. The point estimate for the proportion of those aged 65 and over who have sleep apnea is 0.275. (b) Construct a 99% confidence interval for the proportion of those aged 65 and over who have sleep apnea. Round the answer to at least three decimal places. A 99% confidence interval for the proportion of those aged 65 and over who have sleep apnea is < p < .
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The point estimate is the sample proportion, which is calculated as the number of people with sleep apnea divided by the total number of people in the sample. Point estimate = (number of people with sleep apnea) / (total number of people in the sample) Point Show more…
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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 431 people aged 65 and over, 109 of them had sleep apnea. (a) Find a point estimate for the population proportion of those aged 65 and over who have sleep apnea. Round the answer to at least three decimal places. The point estimate for the proportion of those aged 65 and over who have sleep apnea is .253. (b) Construct a 98% confidence interval for the proportion of those aged 65 and over who have sleep apnea. Round the answer to at least three decimal places. A 98% confidence interval for the proportion of those aged 65 and over who have sleep apnea is
Robin C.
Sleep apnea: 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 434 people aged 65 and over, 106 of them had sleep apnea. A) The point estimate for the proportion of those aged 65 and over who have sleep apnea is 0.244. B) Construct a 99.8% confidence interval for the proportion of those aged 65 and over who have sleep apnea. Round the answer to at least three decimal places. A 99.8% confidence interval for the proportion of those aged 65 and over who have sleep apnea is __< p <__. C) In another study, medical researchers concluded that more than 31% of elderly people have sleep apnea. Based on the confidence interval, does it appear that more than 31% of people aged 65 and over have sleep apnea? Explain. Since all of the values in the confidence interval are Greater Than/Lesser Than(Choose one) 0.31, then the confidence interval Does/Does Not(Choose one) contradict the claim.
Marc L.
Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep. This condition results in lack of sleep and extreme fatigue during waking hours. A current estimate is that 23.5 million out of the 312.7 million Americans suffer from sleep apnea, or approximately 7.5%. A safety commission is concerned about the percentage of commercial truck drivers who suffer from sleep apnea. They do not have any reason to believe that it would be higher or lower than the population's percentage. To test the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 7.5%, a simple random sample of 401 commercial truck drivers is examined by a medical expert, who concludes that 18 suffer from sleep apnea. Does this evidence support the claim that the percentage of commercial truck drivers who suffer from sleep apnea is not 7.5%? Use a 0.01 level of significance. Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Ho: p = 0.075 Ha: p ≠ 0.075 Step 2: What is the test statistic? Step 3: Do we reject the null hypothesis? Sufficient or insufficient data?
Sri K.
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