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Jul 22, 2016 1:12 AM
(7706 views)

Hi,

I'm doing what is basic least square regression on 12 points (4 points in triplicate) but I get different results between excel and JMP. Can anyone offer an explanation? Thanks

Result | Excel | JMP |
---|---|---|

Intercept | -1.30885 | -1.210003 |

Slope | 0.926018 | 0.9250579 |

UCL (99.7%) at intercept | 3.110484 | 10.0827... |

R2 | 0.9973367 | 0.997364 |

for data the data below:

X | Y |
---|---|

0 | 0.942 |

0 | 0.152 |

0 | 0.918 |

27 | 22.597 |

27 | 23.464 |

27 | 22.184 |

55 | 47.329 |

55 | 47.329 |

55 | 49.018 |

137 | 121.108 |

137 | 129.013 |

137 | 129.189 |

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hi johnhart1,

I would guess you made a typo or missed and observation. I get the same results.

best,

ron

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Re: Why do I get difference betwen excel and jmp when doing least square regression?

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hi johnhart1,

I would guess you made a typo or missed and observation. I get the same results.

best,

ron

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Re: Why do I get difference betwen excel and jmp when doing least square regression?

Hi,

I checked that bit and changed all the data to be strictly the same amount of decimal places

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Re: Why do I get difference betwen excel and jmp when doing least square regression?

mmmhhhhh I get the same answer as well now....... something strange is going on somewhere.

Anyway! Thanks for the help!