chap14_2010

chap14_2010 - Chapter 14 Single-Population Estimation...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 14 Single-Population Estimation Population Statistics Population Statistics: , usually unknown Using Sample Statistics to estimate population statistics: Point estimates Confidence interval 2 d R = k x x = = 4 c s = Confidence Interval Wrong Meaning: Probability within the confidence interval is ..% True meaning: The interval will contain the population statistics ..% times Confidence Interval for Population Mean Confidence Interval If is known, If is unknown, n z x n z x 2 2 1- + + n s t x n s t x n n 1 , 1 , 2 2-- + - Common Confidence Levels Confidence Level 1- /2 1-/2 90% .90 .10 .05 .95 95% .95 .05 .025 .975 99% .99 .01 .005 .995 z 0.900 1.282 0.950 1.645 0.975 1.960 0.990 2.326 0.995 2.576 0.100-1.282 0.050-1.645 0.025-1.960 0.010-2.326 0.005-2.576 1- /2 /2-z z 1- -z Example 14.2 =350, n=40, 90% CI 95% CI 99% CI n z x n z x 2 2 1- + + 840 = x 40 350 645 . 1 840 40 350 645 . 1 840 + - 03 . 931 97 . 748 40 350 960 . 1 840 40 350 960 . 1 840 + - 46 . 948 54 . 731 40 350 576 . 2 840 40 350 576 . 2 840 + - 55 . 982 45 . 697 Confidence Interval for...
View Full Document

Page1 / 22

chap14_2010 - Chapter 14 Single-Population Estimation...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online