Accuracy and Precision

It is the degree of exactness of a measurement.

Give an example in which a highly precise scale would be desired.

• measuring chemicals for medicine

  
  

• weighing produce in a grocery store

  
  

It is any difference between a measured value and the actual value of a dimension.

• accuracy

  
  

• uncertainty in a measurement

  
  

• significant figures

  
  

• precision

It is a comparison of a measured value to the
accepted or expected value.

Steps in Problem Solving:

• Plug in known values and evaluate.

  • Estimate and calculate.

• Step 1

• Step 2

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• Step 4

Steps in Problem Solving:

• Write what you know.

• Step 1

• Step 2

• Step 3

• Step 4

Steps in Problem Solving:

• Record your answer.

• Step 1

• Step 2

• Step 3

• Step 4

Steps in Problem Solving:

• Write the formula and solve for the unknown.

• Step 1

• Step 2

• Step 3

• Step 4