Question 8.63

63. Engaging with Science. Refer to Exercise 59.

  1. Find and interpret the margin of error.
  2. How large a sample size is needed to estimate to within 30 seconds with 95% confidence?
  3. How large a sample size is needed to estimate to within 3 seconds with 95% confidence?

8.1.63

(a) seconds. We can estimate μ, the mean length of time that boys remain engaged with a science exhibit at a museum, to within 38.22 seconds with 95% confidence. (b) 59 (c) 5844 days