Hello, Support Staff!

1)PLEASE INTERPRET THE MANN-WHITNEY (NON-PARAMETRIC) TEST HISTOGRAMS FOR BOTH PRE-LEAN AND FOR POST-LEAN.HOW WOULD YOU DESCRIBE THE CHARTS?ARE THEY BOTH SIMILAR IN SHAPE? DO THE DISTRIBUTIONS NEED TO BE SIMILAR IN SHAPE?

NOTE:I ALREADY DID A NORMALITY TEST ON BOTH PRE LEAN AND POST LEAN.THE PRE LEAN INDICATED NORMALITY, BUT THE POST LEAN DID NOT SHOW NORMALITY.SO I COULD NOT USE THE TWO-SAMPLE (PARAMETRIC) T-TEST. I WENT AHEAD AND DID A MANN-WHITNNEY TEST.

2)IF THE P-VALUE OF MANN-WHITNEY IS 0.00 DOES IT MATTER?DOES THE P-VALUE NEED TO BE GREATER THAN THE 0.05 SIGNIFICANCE LEVEL?

3)PLEASE INTERPRET THE MINITAB CAPABILITY 6 PACK REPORTS FOR BOTH PRELEAN AND POST LEAN WAITING TIMES.COMPARE AND CONTRAST THE CHARTS, THEIR PPKs, ETC.

4)WHICH CHART - PRELEAN OR POST LEAN - SHOWS IMPROVEMENT?BETTER PPK?BETTER WAITING TIME?BETTER PROCESS?

PLEASE FIND CHARTS ATTACHED.THEY ARE IN JPEG FORM.PLEASE GIVE THEM TIME TO UPLOAD.....THE FILES MAY BE TOO LARGE.

THANKS A LOT.YOU ARE ALL THE BEST.

\fProcess Capability Sixpack Report for WAITING TIME(PRE-LEAN) X Process Capability Sixpack Report for WAITING TIME(POST-LEAN) Process Capability Sixpack Report for WAITING TIME(PRE-LEAN) Process Capability Sixpack Report for WAITING TIME(POST-LEAN) I Chart Capability Histogram I Chart Capability Histogram Individual Value Specifications US 407 09 12 15 10 21 24 17 Moving Range Chart Normal Prob Plot Normal Prob Plot 10 AD: 0.596, P. 0119 Moving Range Chart AD: 4.185, P: