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This page provides a list of educational videos related to Understanding and Representing Proportions. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Understanding and Representing Proportions.
Comparing population proportions 1 | Probability and Statistics | Khan Academy
By Khan Academy
For qualitative variables, the population proportion is a parameter of interest. A point estimate of the population proportion is given by the sample proportion. With knowledge of the sampling distribution of the sample proportion, an interval estimate of a population proportion is obtained in much the same fashion as for a population mean.
Speed translation | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy
By Khan Academy
This video takes us through some more advanced unit conversion problems. Here, we can see how to make multiple conversions in the same problem concerning speed. Take particular note of how the units change in each step. More importantly, note how, step by step, our units slowly change into the units we want for our final answer. If you are having trouble understanding why this happens, go to the key concept described at 2:20 in the video. Note that this only occurs when multiplying two quantities, not when adding them!
Finding average speed or rate | Ratios, proportions, units, and rates | Pre-Algebra | Khan Academy
By Khan Academy
Using the formula for finding distance we can determine Usian Bolt's average speed, or rate, when he broke the world record in 2009 in the 100m. Watch.
How to use Ratios and Proportions to Solve Real World Problems
By mrtedmartin
Instructor uses a Power Point presentation to demonstrate how to use ratios and proportions to solve problems real world problems. Unit rates are discussed and definitions are given. Solving unit rate problems are modeled and a calculator is used for computation.
8.5 Three Theorems Involving Proportions (Lesson)
By AutenMath
A lesson on the Angle Bisector and Side Splitter theorems and a theorem relating segments cut by two transversals and three or more parallel lines.
Comparing population proportions 1 | Probability and Statistics | Khan Academy
By Khan Academy
For qualitative variables, the population proportion is a parameter of interest. A point estimate of the population proportion is given by the sample proportion. With knowledge of the sampling distribution of the sample proportion, an interval estimate of a population proportion is obtained in much the same fashion as for a population mean.
Solving proportions
By Khan Academy
Here's a great video where we explain the reasoning behind solving proportions. We'll put some algebra to work to get our answers, too.
Writing proportions
By Khan Academy
Some examples of writing two ratios and setting them equal to each other to solve proportion word problems
Solving Similar Triangles and Proportions
By MrCaryMath
YouTube presents Solving Similar Triangles and Proportions, an educational video resource on math.
Comparing population proportions 2 | Probability and Statistics | Khan Academy
By Khan Academy
This video lecture series on Introduction to Statistics includes Average, Sample vs Population, Variance, Standard Deviation, Random Variables, Probability density functions, Binomial distribution, Poisson Process, Law of Large numbers and Normal Distribution......
Fractions & Proportions : Understanding Math Ratios
By eHow
YouTube presents Fractions & Proportions : Understanding Math Ratios an educational video resources on math.
Fractions & Proportions : Understanding Math Ratios
By
In math, ratio is a fraction in which two variables can compared. Discover how to convert ratios into fractions with help from a math teacher in this free vi...
Using Cross Multiplication to Solve Proportions
By Davitily
The instructor uses an electronic chalkboard to demonstrate how to use cross multiplication to solve for a missing variable in a proportion. One example is modeled using a step by step approach.
How To Solve Doppler Effect Physics Problems
By The Organic Chemistry Tutor
This physics video tutorial provides a basic introduction into the doppler effect of moving sound waves. it explains how to solve doppler effect problems in physics. Any time the source moves toward the observer or if the observer moves toward the source, the detected frequency will increase - that is - the observed frequency will be greater than the frequency emitted by the source. The source can be an ambulance truck or a police siren. If the source moves away from the observer or if the observer moves away from the source, the detected frequency will decrease. This video contains plenty of examples and practice problems of calculated the frequency detected by the observer.