Topic_8.1___Statistical_Inference___Comparison_of_Two_Groups___Examples

# Topic_8.1___Statistical_Inference___Comparison_of_Two_Groups___Examples

This preview shows pages 1–6. Sign up to view the full content.

Comparison of Two Groups – Examples Ash Genaidy

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

View Full Document
Large-Sample Test for the Mean -- Case Study Plastic containers for motor oil are blow molded in a machine that has two feeders, each feeding into two three molding stations( a total of six stations). Plastic is extruded through the feeders into continuous cylinders between two halves of each mold. As the molds close, the cylinders are pinched off and air is blown into them to form the container shapes.
Case Study The production engineer is concerned that the weights of molded containers at the two feeders are not uniform. To investigate the cause behind this and to identify the problematic stations, a random sample of twenty-four samples is taken from stations connected with each feeder. Test whether there are differences between the groups

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

View Full Document
Schemat i c Pl ot s | 52. 4 + | | | | | | | 52. 2 + | | | | | | | | | | | 52 + | | | | +- - - - - + | | | | | | | | 51. 8 + | | | | | | + | | | * - - - - - * | +- - - - - + | | 51. 6 + | | | | | | | +- - - - - + | | | | | | | | 51. 4 + | + | | | * - - - - - * | | | | | | | | | 51. 2 + | | | | | | +- - - - - + | | 51 + | | | | | | | 50. 8 + | | | | | 50. 6 + - - - - - - - - - - - - +- - - - - - - - - - - +- - - - - - - - - - - f eeder 1 2 SAS Output – Box Plot for Two Groups
Confidence Interval Feeder # of Obs. Lower 95% CI for Mean

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 10/13/2010 for the course MINE 340 taught by Professor Geinady during the Summer '04 term at University of Cincinnati.

### Page1 / 21

Topic_8.1___Statistical_Inference___Comparison_of_Two_Groups___Examples

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online