Challenge
Agree or disagree: Rolling an odd number is more likely than rolling an even number.
What is disagree?
One possible result of a chance experiment.
What is an outcome?
Uses collected data.
What is experimental probability?
Which is a chance experiment?
A. Today's date
B. Rolling a die
C. A triangle has 3 sides
What is rolling a die?
Probability of rolling an even number on a fair die.
What is 1/2?
A student says P(even)=2/6 when a die is rolled. Agree or disagree?
What is disagree?
All possible outcomes.
What is the sample space?
Which gives an exact value before an experiment?
What is theoretical probability?
Give one example of a chance experiment.
Answers vary.
Examples: flipping a coin, spinning a spinner, drawing a marble, rolling a die.
Probability of drawing a red card from a standard deck.
What is 1/2?
10 coin flips: 7 heads, 3 tails. Experimental probability of heads.
What is 7/10?
Probability found by collecting data.
What is experimental probability?
A coin is flipped 20 times and lands heads 11 times. Experimental probability of heads.
What is 11/20?
Which situation is NOT a chance experiment?
A. Picking a card
B. Tossing a coin
C. The sun rises tomorrow
D. Rolling a die
What is the sun rises tomorrow?
Probability of rolling a number greater than 4.
What is 2/6 or 1/3?
Create an event with probability 1/2 when rolling a die.
Examples: even number, odd number, less than 4.
Probability calculated before an experiment using math.
What is theoretical probability?
Why do larger numbers of trials usually give better estimates?
What is they tend to get closer to the theoretical probability?
Why is rolling a die considered a chance experiment?
Because the outcome cannot be predicted with certainty before it happens.
Probability of rolling a prime number on a die.
What is 3/6 or 1/2?
Explain why experiments do not always match theoretical probability.
What is random variation / chance?
A model used to imitate a chance experiment.
What is a simulation?
A fair die is rolled 60 times and a 6 appears 8 times. Experimental probability of a 6.
What is 8/60 or 2/15?
A student says,
"Every experiment is a chance experiment."
Agree or disagree?
Explain.
Disagree.
A chance experiment must have uncertain outcomes.
A bag has 3 blue, 5 red, and 2 green marbles. Probability of red.
What is 5/10 or 1/2?