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Hauskov
Hauskov
Level I

Density curve problem for small values in Analyze->Distribution

Created: Apr 27, 2023 07:21 AM  |  Last Modified: Jun 11, 2023 4:31 AM (483 views)

Hi

Using JMP 15, the Analyze->Distribution density curve is not fitting properly. A few examples below. The parameters for the fitted normal seems correct, but the density curve is off. Works fine for "life distribution" density curve or when i multiply the data by eg. 1000. What's going on here?

Hauskov_0-1682594028936.png

 

Fitted Normal Distribution

Parameter

 

Estimate

Std Error

Lower 95%

Upper 95%

 

Location

μ

0,0143429

0,0002075

0,0139362

0,0147495

 

Dispersion

σ

0,0007763

0,0055724

6,025e-10

0,0008905

 

 

Hauskov_1-1682594040378.png

 

Parameter

 

Estimate

Std Error

Lower 95%

Upper 95%

 

Location

μ

0,0144143

0,0003122

0,0138024

0,0150261

 

Dispersion

σ

0,0011681

0,0068354

1,22e-8

0,0013398

 

 

example.jmp
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1 REPLY 1
tonya_mauldin
Staff tonya_mauldin
Staff

Re: Density curve problem for small values in Analyze->Distribution

Apr 27, 2023 08:33 AM (473 views)  |  Posted in reply to message from Hauskov 04-27-2023

This appears to have been an issue in Version 15.  When I used Version 17(currently shipping version) with your data I get the following:

distrib.png

I suggest upgrading.