E Test: Practice Test 5 (the actual test 5 contains

Test: practice Test 5 (the actual test 5 contains 15 questions) Question 20 of 21 This test: 21 point(s) possible This question: 1 point(s) possible A Simple random sample of size n IS drawn from a population that IS known to be normally distributed. The sample variance, s2, IS determined to be 11.9. Complete parts (a) through (c). (a) Construct a confidence Interval for 02 If the sample size, n, is 20. The ouver bound s t:::@].(Round to Ovo dec mal places as needed.) The upper bound s to dec mal places as needed.) (b) Construct a confidence Interval for 02 If the sample size, n, is 30. The ouver bound s to Ovo dec mal places as needed.) The upper bound s to dec mal places as needed.) How does Increas ng the sample size affect the width of the Interval? o The width decreases o The width does not change o The width Increases Statcrunch Submit test Next