00:04
One second, is problem you are given a control chart, and if i'm looking at this correctly, i believe you're wanting help with 5 .18, where it says apply the western electric rules to the control chart presented in 516.
00:19
Would these result in any out -of -control warning signs? in the previous question, it said sketch the warning limits on the control chart, and without any specific standard deviation here, i'm looking at, and without being able to see the lines on there for sure, i'm just making a little bit of a guess here, but if your upper control limit is 20 and your center line is 15, then it looks to me like if you kind of try to divide those up in thirds, 5 divided by 3 would be, one in two thirds, i guess.
01:05
Yeah, one and two thirds.
01:07
So this would be about 16 .6 repeating.
01:12
And then at another one and two thirds, that would be 18 .3 repeating.
01:19
I mean, just as estimates, but you can't really tell on the chart on exactly where your points are.
01:28
And so i'm just making a guess on where your lines are here compared to where your points are in the graph.
01:35
And i think by the time i explain this to you, i think you'll be able to tell and make your own interpretation.
01:43
Maybe you know what the exact data points are.
01:46
I'm not sure it wasn't given.
01:48
So with the western electric rules, rule 1 says if you have any single data point fall outside the three signal limit.
01:58
And this upper control limit would be your mu plus 3 sigma and the lower one would be your mu -mue, minus three sigma.
02:06
So you don't have any points up here or down here.
02:11
And so rule one for that is okay.
02:14
And then real two says two out of three consecutive points fall beyond the two signal limit.
02:20
This is the one that just depending on exactly where the points fall on that control chart, if you look at this right here, the way i drew it, it looks like this point that these two points actually do fall above the two sigma limit.
02:33
And if that's how you interpret it, then i would say you're getting a warning sign for rule number two...