Carmichael Probability Review

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What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1, where 0 means the event will not happen and 1 means it will definitely happen.

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How do you convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add a percent sign. For example, 0.02 becomes 2%.

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What is the probability of landing on a specific number on a spinner with 8 equal sections?

Back

The probability of landing on a specific number is 1 divided by the total number of sections. For example, the probability of landing on 7 is 1/8.

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If you flip a coin 100 times, how many times would you expect to land on heads?

Back

You would expect to land on heads approximately 50 times, since the probability of heads is 1/2.

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What is a prediction in statistics?

Back

A prediction is an estimate of a future outcome based on current data or trends.

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How do you calculate the expected number of outcomes in a survey?

Back

To calculate the expected number of outcomes, use the formula: (number of responses / total surveyed) * total expected responses.

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What is the probability of an event that is certain to happen?

Back

The probability of an event that is certain to happen is 1.

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What is the probability of an event that is impossible?

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The probability of an event that is impossible is 0.

Front

If 16% of a group prefers a certain option, how do you find the number of people who prefer it in a larger group?

Back

Multiply the percentage (as a decimal) by the total number of people in the larger group. For example, 16% of 100 people is 0.16 * 100 = 16 people.

Front

What does it mean if an event has a probability of 1/4?

Back

It means that there is a 25% chance that the event will occur.