1. Work with a friend. Throw a die 20 times and record each time that it lands on a 4.

Fill in: number of times: ________________________________________________

2. Work with a friend. Toss a coin into the air 20 times and note each time it falls on 'heads'.

Fill in: number of times: ________________________________________________

DID YOU KNOW?

The number of times that were recorded above is referred to as the relative frequency.

If the 4 had shown up 9 times in the above example, we would calculate the relative frequency as follows:

Relative frequency =

number of fours

number of throws

3. Throw the die 30 times and see how often it lands on 2.

Calculate the relative frequency.

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Time For Self-Assessment

It is important to know if you have understood the last part of the work. Read the criteria below. Evaluate yourself on a scale of 1-4 by circling the appropriate number.

Criteria | 1 = Not at all.2 = Just a little.3 = Well.4 = Very well. | ||||

I am able to explain the concept of "probability". | 1 | 2 | 3 | 4 | |

I can explain what a probability of one means. | 1 | 2 | 3 | 4 | |

I can explain what a probability of nought means. | 1 | 1 | 1 | 1 | |

I can determine probability correctly. | 1 | 2 | 3 | 4 | |

I can determine relative frequency correctly. | 1 | 2 | 3 | 4 | |

* Learning Outcome 5:*The learner will be able to collect, summarise, display and critically analyse data in order to draw conclusions and make predictions, and to interpret and determine chance variation.

* Assessment Standard 5.10:* We know this when the learner counts the frequency of actual outcomes for a series of trials.