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From the SAS output, interpret the 95% confidence interval for the true average difference in dental measurements in th

From the SAS output, interpret the 95% confidence interval for the true average difference in dental measurements in th

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The following data are on the dental measurements (distance in mm from the center of the pituitary to the pterygomaxillary fissure of 11 girls and 16 boys, all of whom were 16 years of age.

a) From the SAS output, interpret the 95% confidence interval for the true average difference in dental measurements in the population of 16-year-old boy and 16-year-old girls (assume the population variances are equal).

 

The SAS System The TTEST Procedure Variable: x Std Dev Std Err Minimum Maximum 2.4273 0.7676 19.5000 28.0000 31.5000 2.0854 0.5214 25.0000 2.2198 0.8948 Mean 95% CL Mean 23.8500 22.1136 25.5864 27.4688 26.3575 28.5800 Std Dev 95% CL Std Dev 2.4273 1.6696 4.4313 2.0854 1.5405 3.2276 -3.6187 -5.4656 -1.7719 2.2198 1.7333 3.0881 -3.6187 -5.5760 -1.6615 DF t Value Pr > ltl Method Variances Pooled Equal Satterthwaite Unequal 17.043 -3.90 0.0011 24 -4.04 0.0005 Equality of Variances Method Num DF Den DF F Value Pr > F Folded F 9 15 1.35 0.5795 gender Female Male Diff (1-2) gender Method Female Male Diff (1-2) Pooled Diff (1-2) Satterthwaite N Mean 10 23.8500 16 27.4688 -3.6187
Transcribed Image Text:The SAS System The TTEST Procedure Variable: x Std Dev Std Err Minimum Maximum 2.4273 0.7676 19.5000 28.0000 31.5000 2.0854 0.5214 25.0000 2.2198 0.8948 Mean 95% CL Mean 23.8500 22.1136 25.5864 27.4688 26.3575 28.5800 Std Dev 95% CL Std Dev 2.4273 1.6696 4.4313 2.0854 1.5405 3.2276 -3.6187 -5.4656 -1.7719 2.2198 1.7333 3.0881 -3.6187 -5.5760 -1.6615 DF t Value Pr > ltl Method Variances Pooled Equal Satterthwaite Unequal 17.043 -3.90 0.0011 24 -4.04 0.0005 Equality of Variances Method Num DF Den DF F Value Pr > F Folded F 9 15 1.35 0.5795 gender Female Male Diff (1-2) gender Method Female Male Diff (1-2) Pooled Diff (1-2) Satterthwaite N Mean 10 23.8500 16 27.4688 -3.6187
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