Httpsstudycomacademylessonwhat is percentage error

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• Percentage difference - difference between two values divided by the average of
the two values shown as a percentage
Source:
• Precision – is the closeness of the values to each other
Source: Discover Science Physics by David et.al, p. 13
• Uncertainty – usually described as an error in measurement
Source:
Multiple Choice Test. Read and answer the following questions. Write the letter of
your answer in your paper.
1. Three different people weigh a standard mass of 2.00 g on the same balance. Each
person obtains a reading of exactly 7.32 g for the mass of the standard. These
results imply that the balance that was used is:
A. accurate but not precise C. neither accurate nor precise
B. precise but not accurate D. both accurate and precise
IV. Pre -Test IV. Pre -Test
2. The closeness of a measurement to its true value is a measure of its:
3. Systematic errors occur due to
4. A measurement which on repetition gives same or nearly same result is called 5. Errors that occur during measurement of the quantities are of
A. 2 types C. 4 types
B. 3 types D. 5 types

5
These two circles represent the dart boards and the dots represent the bulls-eyes.
Procedure:
1. Play dart game.
2. Use markers to serve as your darts and try to hit the bulls-eye using markers.
3. Try it for five (5) times.
4. Mark the areas in the circle where you hit. Do these on both circles.
V. Learning Activities
A
B
V. Learning Activities
Directions: Get a dart board if you have in your
house, if none, draw in a two (2) whole bond
paper two big circles with a dot in the center as
illustrated below.
ELICIT
Activity 1: Let’ s play Dart!
ENGAGE
Activity 2: Look and Find!
Directions: In your Module Notebook, answer
the following questions based on Activity 1. (Do
not write anything on your module.)
✓ What can you observe from the two circles you hit?
✓ Describe the position of the marks in all five (5)
attempts and compare it with one another.
✓
• What circle shows accuracy through the marks hit
by the markers?
• What circle shows precision?

6
Directions: Tell whether the situations below
are accurate, precise, accurate but not
precise, precise but not accurate or neither
accurate nor precise. Write your answer on
your Module Notebook. (Do not write
anything on your module.)
Accuracy and Precision
Source:
Based on the above illustrations shown, accuracy is described as the closeness
of the thrown darts to the target, which is the bulls-eye. The closer the darts are to the
bulls-eye, the more accurate they are. Precision, on the other hand, is the closeness
of the darts to each other, regardless of the accuracy. The nearer the darts are to each