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## Probability Distribution Based on Empirical Probabilities

#### High School Statistics - HSS-MD.A.4

What are Empirical Probabilities? When we talk about calculating probability, there are two cases. The first is when there is a clearly-defined sample space and the second case is when the sample space is not as well-defined. The probability that we calculate using a sample space that is not clearly defined, we term it as empirical or experimental probability. The empirical probability is the type where we have to calculate the chances of event's occurrence using the historical data. The formula to calculate empirical probability is; Empirical Probability = (Number of times occurred) / (total number of times experiment performed) The probability that we can calculate through this is estimated and are not exact which we calculate using the clearly defined sample space. These worksheets and lessons help students learn how to read and create probability distributions based mostly on observations.

### Printable Worksheets And Lessons  #### Homework Sheets

The problems are very tricky. Read the problems slowly and outline them as you go.

• Homework 1 - Mark dealt a hand of fifteen cards from a standard deck of playing cards. The number of possible hands is 4,481,381,406,320. The number of possible hands consisting entirely of red cards (heart and diamond) is 7,726,160.
• Homework 2 - Last month, 205 of my 250 customers purchased one or more of my cell phones. Thus, the probability that a randomly selected customer purchased a cell phone is 205/250 = 0.82. Is this estimated probability or empirical probability?
• Homework 3 - Carl rolls three standard dice. The number of possible outcomes is 216. The number of possible outcomes consisting entirely of {four and five} is 8. What is the probability getting only fives on all three dice?

#### Practice Worksheets

The middle sheets is just for understanding the validity of the data.

• Practice 1 - What is the probability of obtaining an outcome that consists entirely of the number four?
• Practice 2 - Last month, 389 of my 560 customers purchased one or more of my super magic brooms. Thus, the probability that a randomly selected customer purchased a broom is 389/560 = 0.69. Is this a theoretical or empirical probability?
• Practice 3 - What is the probability of an outcome that does not consist entirely of black cards?

#### Math Skill Quizzes

Quiz 1 has you label the data. Quiz 2 has you determine the actual probability.

• Quiz 1 - Jeff made 45 of his shots out of 70 attempted in this week’s games. His coach determines his probability of making a basket as 0.64. 45/70= 0.64. Is this a theoretical or empirical probability?
• Quiz 2 - A casino craps table pays out when you roll an eleven with a pair of dice. The casino pays out double if you roll a seven. What is the probability of rolling a seven with a pair of dice?