Question

A sample of Alzheimer's patients are 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 in 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. Compute a 99 percent confidence interval for this data. What does this information tell you about an individual’s (an Alzheimer's patient) stage IV sleep?

Answer 1

We are 99 percent confident that the true mean to assess the amount of time in stage IV sleep over a 24-hour period. lies betweeb 43.231 and 52.769