Simple Probability & Predictions

Front

What is probability?

Back

Probability is a measure of how likely an event is to occur, expressed as a number between 0 and 1.

Front

What is the probability of rolling a 2 or a 3 on a number cube (1-6)?

Back

1/3

Front

If you roll a die 90 times, how many times would you expect to roll a number less than or equal to 5?

Back

75 times

Front

What does it mean if a gift was favored 16% of the time in a survey?

Back

It means that out of 100 responses, approximately 16 people chose that gift as their favorite.

Front

If you have 12 shapes in a bag and you predict pulling out a circle 60 times, how many circles are expected if you replace each shape after pulling?

Back

25 times

Front

How do you calculate the expected number of students choosing a specific animal based on a survey?

Back

Use the proportion from the survey to predict for a larger group. For example, if 60 out of 100 chose a giraffe, then for 250 students, expect 60 students.

Front

What is a number cube?

Back

A number cube is a six-sided die with faces numbered from 1 to 6.

Front

What is the formula for calculating probability?

Back

Probability = (Number of favorable outcomes) / (Total number of possible outcomes).

Front

If 25 people were surveyed and 16% favored a gift, how many people is that?

Back

4 people favored that gift (16% of 25 is 4).

Front

What is the expected outcome when rolling a fair die?

Back

Each number (1-6) has an equal probability of 1/6.