Quadratic regression Calculator

Analyzes the data table by quadratic regression and draws the chart.

Quadratic regression: y=A+Bx+Cx2
    1. (input by clicking each cell in the table below)
data 

Guidelines for interpreting correlation coefficient r :
  0.7<|r|≦1        strong correlation
  0.4<|r|<0.7     moderate correlation
  0.2<|r|<0.4     weak correlation
  0≦|r|<0.2         no correlation

    Quadratic regression
    [1-10] /113Disp-Num
    BACK NEXT
    [1]  2022/09/30 14:52   60 years old level or over / A retired person / Very /
    Purpose of use
    regression of data points for portfolio analysis.

    want to derive a figure of merit for holdings in my portfolio.
    [2]  2022/09/12 05:36   Under 20 years old / High-school/ University/ Grad student / Useful /
    Purpose of use
    trigonometry
    [3]  2022/06/17 00:39   50 years old level / An engineer / Very /
    Purpose of use
    Analysing calibration errors of open-loop control for a utility scale battery energy storage system
    [4]  2022/06/08 17:58   30 years old level / An engineer / Very /
    Purpose of use
    alcohol by volume vs density chart to formula constants computation
    [5]  2022/02/24 06:45   - / - / - /
    Comment/Request
    no bugs but id like to be able to zoom in on the graph
    [6]  2022/01/08 02:03   30 years old level / An engineer / Very /
    Purpose of use
    Fitting reported pump flow-rate vs head curve
    [7]  2022/01/01 06:35   60 years old level or over / High-school/ University/ Grad student / Useful /
    Purpose of use
    To approximate a Sine curve with a quardric equation to generate a signal for a computer music system. Also to see if you can use this to calculate sine values using two quadratic equations with one of them being the correction value add to the other to get it. I think this would a fast to calculate Sine values than the Taylor -Mac series this would be faster.
    I hoping this works.
    [8]  2021/12/27 01:51   30 years old level / High-school/ University/ Grad student / Useful /
    Purpose of use
    calculate expected Token in a crypto coin IDO
    Comment/Request
    thank you
    [9]  2021/12/19 03:37   60 years old level or over / A retired person / Useful /
    Purpose of use
    checking site's analysis vs LibreCalc. Had 1000 data pairs, very useful to show that despite a seemingly very high fit correlation, as one fits subsets toward the higher end, one quickly realizes that rather than 1.0x^2+3x (this site found ~1.0x^2+x ), the true fit is tending toward x^2. Ref OEIS A349791.
    Comment/Request
    Would love to be able to force intercept (A)=0
    [10]  2021/12/07 11:02   30 years old level / An engineer / Very /
    Purpose of use
    Constructing a parabolic path water fountain going through certain structures (points)

    BACK NEXT

    Thank you for your questionnaire.

    Sending completion



    Back

    To improve this 'Quadratic regression Calculator', please fill in questionnaire.
    Age


    Occupation


    Useful?

    Purpose of use?
    Comment/Request (Click here to report a bug).Bug report (Click here to report questionnaire.)
    Calculation bug(Please enter information such as specific input values, calculation result, correct result, and reference materials (URL and documents).)
    Text bug(Please enter information such as wrong and correct texts)
    Your feedback and comments may be posted as customer voice.
    送信