O'Reilly logo

Statistical Techniques for Transportation Engineering by Naresh Davergave, Anil Shah, G Rao, Kumar Molugaram

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Girlsx¯1=84imageSD of S1=10n1=121
Boysx¯2=80imageSD of S2=14n2=81

Image

Is the difference between the standard deviations (SDs) significant?

Solution: Null hypothesis H0:σ1=σ2image

Alternative hypothesis: H1:σ1σ2image (two-tailed test)

Level of significance=5%

Z=1.96 at 5% level ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required