Question 8.75

75. Asthma and Quality of Life. A study examined the relationship between perceived neighborhood problems, quality of life, and mental health among adults with asthma.8 Among those reporting the most serious neighborhood problems, the 95% confidence interval for the population mean quality of life score was (2.7152, 9.1048).

  1. What is ?
  2. Find .
  3. Compute and interpret the margin of error.
  4. Suppose . Find the value for .

8.1.75

(a) (b) 5.91 (c) 3.1948. We can estimate the true mean quality of life score within 3.1948 with 95% confidence. (d) 9.78