Probability and Relative Frequency

a measure of the likelihood that the event will occur; ranges include 0 (impossible) to 1 (certain

• Probability

• frequency table

• event

• cumulative frequency

The percentage a specific frequency occurred out of all of the outcomes in the event

• probability

• relative frequency

• uniform probability

• cumulative frequency

A coin is thrown 30 times. It lands on tails 20 times. What is the relative frequency of the coin landing on tails?

The bar graph shows the results of spinning the spinner 200 times. What is the experimental probability of landing on a 3?

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Find the experimental probability of rolling a 3 if the following occurs when a die is rolled:

Dice Rolls: 1, 3, 3, 4, 4

• 3/5

• 1/6

• 2/5

• 1/3

If you flip the fair coin 100 times, approximately how many times could you expect to land on tails?

• 50 times

• 100 times

• 200 times

The probability that a biased dice will land on a 6 is 0.3. The dice is going to be rolled 200 times. Work out an estimate for the number of times the dice will land on 6.

• 60

• 140

• 1.8

• 1200

The probability that a sunflower seed will germinate is 0.9. Alan is going to plant 50 sunflower seeds. Work out an estimate for the number of seeds that will germinate.

• 55.6

• 5

• 45

• 10

The probability that Matt scores a penalty is 0.96. Matt is going to take 25 penalties. Work out an estimate for the number of times Matt will score.

• 30

• 26

• 1

• 24

A dice is rolled 50 times. It lands on six 37 times. What is the experimental probability of the dice landing on six?