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Section Exercise $22 A random sample of ‘14 items is drawn from a population whose standard deviation is unknown. The sample mean is I = T89 and the sample standard deviation is s = 5. Use flpfldix D to find the values of Student’s t. [a1 Construct an interval estimate of u with 98% confidence. [Round your answers to 3 decimal places.] Tl’le98%oonfidencei1tervdisfmml:|hl:| [b] Construct an interval estimate of u with 98% confidence. assuming that s = ‘19. {Round your answers to 3 decimal places.) Tl’le98%oonfidencei1tervdisfmml:|hl:| [c1 Construct an interval estimate of u with 98% confidence. assuming that s = 29. {Round your answers to 3 decimal places.) 111e98%confidencei1tervdisfiom |:|h|:| [d] Describe hollIlr the confidence interval changes as s increases. XT‘H. . I L) The Interval stays the same as s Increases. 2-K . . n. L) The Interval gets wIder as s Increases. 2-K . I L) The Interval gets narrower as s Increases.

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Section Exercise $22 A random sample of ‘14 items is drawn from a population whose standard deviation is unknown. The sample mean is I = T89 and the sample standard deviation is s = 5. Use flpfldix D to find the values of
Student’s t. [a1 Construct an interval estimate of u with 98% confidence. [Round your answers to 3 decimal places.] Tl’le98%oonfidencei1tervdisfmml:|hl:| [b] Construct an interval estimate of u with 98% confidence. assuming that s = ‘19. {Round your answers
to 3 decimal places.) Tl’le98%oonfidencei1tervdisfmml:|hl:| [c1 Construct an interval estimate of u with 98% confidence. assuming that s = 29. {Round your answers
to 3 decimal places.) 111e98%confidencei1tervdisfiom |:|h|:|
[d] Describe hollIlr the confidence interval changes as s increases. XT‘H. . I L) The Interval stays the same as s Increases.
2-K . . n. L) The Interval gets wIder as s Increases. 2-K . I L) The Interval gets narrower as s Increases.

 
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