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) A random sample of 66 seniors in NJ that averagely speaking they exercise 40 minutes per day, with a standard deviation of 10 minutes.
- ) A random sample of 66 seniors in NJ that averagely speaking they exercise 40 minutes per day, with a standard deviation of 10 minutes.
- Construct a 99 percent confidence interval for the mean number of minutes they exercise?
- Does the result in part (a) means that 99% of seniors' exercise time per day is in the range of your CI?
- If you want to be 95% confident instead, and you want to control the maximal error of estimation to be 3 minutes, how many more seniors needs to be collected?
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Basic Statistics For Business & Economics
Authors: Douglas A. Lind, William G Marchal, Samuel A. Wathen, Carol Ann Waite
6th Canadian Edition
1259268934, 978-1259268939
