Percent Error The percent that an estimate varies from an actual amount.

Slides:

Advertisements

Similar presentations

Proportions. Josh Hamilton got 186 hits out of 518 attempts in  What is his batting average?  Is this Hamilton’s ABILITY to get a hit?  Are you.

Advertisements

3-7 Percent of Change. Percent of change is a simple ratio. The formula is: amount of change original amount * 100 This can be an increase or a decrease.

OBJECTIVE We will find the missing terms in an arithmetic and a geometric sequence by looking for a pattern and using the formula.

Percent Error The percent that an estimate varies from an actual amount.

Algebra IA – Chapter 2 Problems for Today.

Percent of Change.

Warm-up: Solve the proportion.

Math 20-1 Chapter 7 Absolute Value and Reciprocal Functions

Inverse Variation Inverse Variation. Do you remember? Direct Variation Use y = kx. Means “y v vv varies directly with x.” k is called the c cc constant.

Sales Tax, Tip and Commission

The percent that a value increases or decreases (Section 5.7 in book)

Grade 7 Bop Problem and Directions for Duplicating Submitted by:

Percent of Change The percent that a value increases or decreases.

Lesson 4-3 Proportions and Percent Equations Objective: To use proportions when solving percent problems and to write and solve percent problems.

2.6 Ratio, Proportion, and Percent

Percents and Fractions. Vocabulary A percent is a ratio that compares a number to 100. It means “per 100.” 49 out of 100 is 49%.

Objective Calculate the amount of materials needed for a construction project.

Course 2, Lesson 2-5 Use the determine reasonable answers strategy to solve Exercises 1–4. 1. If the speed limit is 65 miles per hour, what is a reasonable.

Scale Drawing and Models

Facebook YearFriends Amount of change = Percent of change is a ratio that compares the change in quantity to the original amount. (What percent of the.

Use the cross products property

Percent of change. Find the percent of change from a 28 to a 21 Step 1: Subtract = 7 Step 2: Make a fraction Difference Original amount 7 28 Step.

Section 6-4: Solving Percent Problems Review Lessons 7.1 and 7.2: Rates, Ratios, and Proportions Standards: AF 4.1 and NS 1.3 Objectives: Find Percents.

Estimating Numbers Lesson 29. Math Vocabulary To “estimate” a # means: A close guess of the actual value, usually with some thought or calculation involved.

Notes Over 11.1 Proportions Vocabulary Proportion - an equation that states that two ratios are equal. Cross Product Property - the product of the extremes.

Percent of Change. Percent of change -Ratio that compares the changes in quantity to the original amount Percent of change - Percent of increase - Percent.

Math 20-1 Chapter 7 Absolute Value and Reciprocal Functions 7.3 Absolute Value Function Teacher Notes.

6-8 Scale Drawings. Scale Drawing/Model  Used to represent objects too large or too small to be drawn or built in actual size  All measurements are.

Percent of Change.

Use the cross products property EXAMPLE 1 Write original proportion = x 6 Solve the proportion =. 8 x 6 15 Cross products property Simplify. 120.

Estimating Sums and Differences Rounding Clustering Front-end-estimating.

$100 $200 $300 $400 $100 $200 $300 $400 $300 $200 $100 Balance equations Addition / subtraction of 3 digit numbers Guess the number after subtraction.

A variable is an unknown quantity. For example: What goes in the box? = ? = = 10.

VOCABULARY. For any numbers a, b, and c, if a = b then a + c = b + c Addition Property of Equality.

Splash Screen. Then/Now Find percent of error. Find percent of increase and decrease.

Bell Work Explain why Jamar’s solution was incorrect.

PERCENT YIELD. Percent Yield Percent yield is the ratio of actual yield of an experiment to theoretical yield. To find percent yield, you divide the actual.

Direct Variation 88 Warm Up Use the point-slope form of each equation to identify a point the line passes through and the slope of the line. 1. y – 3 =

Experimental Probability Lesson 3.6 Core Focus on Ratios, Rates and Statistics.

REVIEW Find unit rate of $4 for 5 cans of vegys. Find the average speed of 1500 miles in 4hrs. Write decimal or fraction as percent.02 ¾ A concert sold.

Section 5-1 p. 206 Goal – to write ratios as percents and vice versa.

Statistics & Probability

7.1 OBJ: Use ratios and proportions.

The percent that an estimate varies from an actual amount

The percent that an estimate varies from an actual amount

Essential Questions: How can sums and differences of fractions and mixed numbers be estimated? What are the standard procedures for adding and subtracting.

Ch. 2 Vocabulary 7.) Ratio 8.) Rate 9.) Unit rate 10.) Conversion factor 11.) Unit analysis.

Approximating Square Roots to the Nearest Hundredth

Percent Applications Project

Percent of Change and Error

Main Idea and New Vocabulary Key Concept: Percent of Change

Solve Proportions Using Cross Products

Evaluate the expression: 2(10−2)÷ ÷ ÷4 16÷4 =4

Calculating Percent Error

Goal: The learner will use proportions to find measures of objects.

I have 0 Jelly Beans I need Jelly Beans.

HW L10-3 pg 392 #8-14 L10-3 Notes: Scale Drawings and Models

Percent of Change.

Problem Solving with Proportional Relationships

Review: Mini-Quiz Percent Error

Proportional Relationships

Ratios and Proportions Vocabulary

Percent of Change and Error

Arithmetic Sequences Unit 6 Notes.

Ch. 2 Vocabulary 12.)Proportion 13.) Cross products (of proportion)

Math 20-1 Chapter 8 Absolute Value and Reciprocal Functions

How many marbles are in the jar? Kindergarten

Presentation transcript:

Percent Error The percent that an estimate varies from an actual amount

Vocabulary The percent error is: – a ratio that compares the inaccuracy of an estimate, or the amount of error, to the actual amount. To find the percent error, the proportion used is:

Ex 1) As a fundraiser, the Student Activities Council sold chances to guess the number of jelly beans in a jar. Brenda won the raffle with a guess of 370 jelly beans even though there were actually 400 jelly beans in the jar. What was the percent error? Subtract the guess and the actual value to find the amount of error. The percent error between Brenda’s guess and the actual amount is 7.5%.

Ex 2) George is adding a rail around his back porch, and he estimates that the length of the porch is 13.5 feet. The actual length is 15 feet. Find the percent error in George’s estimate. Subtract the estimate and the actual value to find the amount of error. The percent error between George’s estimate and the actual amount is 10%.