# NEED HELP FINDING THE UCL LCL

Six Sigma – iSixSigma Forums Old Forums Healthcare NEED HELP FINDING THE UCL LCL

Viewing 9 posts - 1 through 9 (of 9 total)
• Author
Posts
• #25724

coletta
Participant

Wait time (minutes) in order of occurrence

1
10

2
17

3
29

4
39

5
55

6
64

7
28

8
6

9
5

10
3

11
39

12
46

13
35

14
30

15
6

16
32

17
33

18
11

19
20

20
13

21
9

22
14

23
12

24
30

25
56

26
62

27
73

28
54

29
10

30
9
am hitting a brick wall i need to find the UCL FOR THE RANGE AND THE INDIVIDUAL & LCL FOR THE INDIVIDUAL. I got the average of 28.33 and the range of 70

0
#62256

ROSS
Member

It looks like we are doing the same health care project. Did you get an answer?

0
#62267

coletta
Participant

yes wow really

0
#62269

ROSS
Member

would you mind helping me out?

0
#62270

coletta
Participant

we can talk off this board if that is ok with you is your  professor name starts with K

0
#62271

Robert Butler
Participant
#62272

ROSS
Member

here is my email: t[email protected] shoot me an email and we can take it from there. No we have different instructors. most likely a different school as well. thank you so much. I am at my zero hour..

0
#62273

coletta
Participant

i got the answer already thank u so much you are really good right now am trying to work out another problem finding the lowest and upper expectation variation for a mean of 21.193548 and standard deviation of 6.901301 can u help in the steps

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#62274

Robert Butler
Participant

Since it sounds like the same set of data then everything I said in the message I referred to applies and the steps are exactly the same except now you are looking at the spread, not of individuals, but of samples of means from that same population.  The question is how many data points would go into another sample mean from the population from which you drew the 31 measures you do have?
Usually, in problems of this type, it is assumed you would go out and get a new sample of 31 measures.  Therefore, instead of 1 under the square root you would now have 31.  Put that number in the equation and you will have your estimates.

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