Curve Fitting

Curve Fitting Screenshot
  • Polynomials
  • Error Analysis
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Topics

  • Polynomials
  • Error Analysis

Description

Drag data points and their error bars and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, or cubic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.

Sample Learning Goals

  • Explain how the range and uncertainty and number of data points affect correlation coefficient and chi squared
  • Describe how correlation coefficient and chi squared can be used to indicate how well a curve describes the data relationship
  • Apply understanding of Curve Fitting to designing experiments

Standards Alignment

Common Core - Math

HSS-ID.B.6
Represent data on two quantitative variables on a scatter plot, and describe how the variables are related.
HSS-ID.B.6a
Fit a function to the data; use functions fitted to data to solve problems in the context of the data. Use given functions or choose a function suggested by the context. Emphasize linear, quadratic, and exponential models.
HSS-ID.B.6b
Informally assess the fit of a function by plotting and analyzing residuals.
Version 2.02

Teacher Tips

Download teacher tips PDF Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

Teacher-Submitted Activities

Concept questions for Physics using PhET (Inquiry Based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein UG-Intro
HS
MC Physics
Algebra-based Physics Semester one lessons, clicker questions, and schedule in pdf (Inquiry Based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
Demo
Lab
HW
Physics
How do PhET simulations fit in my middle school program? This contribution was designed by PhET. Sarah Borenstein MS Other Chemistry
Physics
Biology
Earth Science
Alignment of PhET sims with NGSS This contribution was designed by PhET. Trish Loeblein updated by Diana López HS
MS
Other Earth Science
Biology
Physics
Chemistry
PhET Sims Aligned to the Chemistry Curriculum This contribution was designed by PhET. Julia Chamberlain HS
UG-Intro
Other Chemistry
Capacitors - Introduction- Bassam Rashed HS
UG-Adv
UG-Intro
Guided
HW
Demo
Remote
Lab
Physics
Mapping of PhET and IBDP Physics Jaya Ramchandani HS Other Physics
MS and HS TEK to Sim Alignment Elyse Zimmer HS
MS
Other Physics
Chemistry
Biology
PhET Simulations Aligned for AP Physics C Roberta Tanner HS Other Physics
Line of best fit activity Dave Dalton HS Lab
HW
Mathematics
Moteur en PhET Bernard Lacour Other Lab Physics
커브 핏팅 SIM 사용 설명서 Wha Kuk Lee UG-Intro
HS
UG-Adv
Lab
Demo
HW
Earth Science
Chemistry
Physics
Mathematics
Longitud de un péndulo y su periodo. Denis Salazar UG-Intro
HS
MS
HW
Guided
Demo
Lab
Physics
Mathematics

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Design Team Third-party Libraries Thanks To
  • Michael Dubson (developer/lead)
  • Trish Loeblein