Homework 6 – A sample of Alzheimer’s patients is tested
Homework 6
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1. A sample of Alzheimer’s patients is tested to assess the amount of time in stage IV sleep. It has been hypothesized that individuals suffering from Alzheimer’s Disease may spend less time per night in the deeper stages of sleep. Number of minutes spent is Stage IV sleep is recorded for sixty-one patients. The sample produced a mean of 48 minutes (S=14 minutes) of stage IV sleep over a 24 hour period of time. Compute a 95 percent confidence interval for this data. What does this information tell you about a particular individual’s (an Alzheimer’s patient) stage IV sleep?
2. A university wants to know more about the knowledge of students regarding international events. They are concerned that their students are uninformed in regards to news from other countries. A standardized test is used to assess students’ knowledge of world events (national reported mean=65, S=5). A sample of 30 students are tested (sample mean=58, Standard Error=3.2). Compute a 99 percent confidence interval based on this sample’s data. How do these students compare to the national sample?
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