MAT201 MOD 1 Essay

593 Words Dec 15th, 2014 3 Pages

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Course # MAT201

Case Module 1

Introduction of Probability


1. In a poll, respondents were asked if they have traveled to Europe. 68 respondents indicated that they have traveled to Europe and 124 respondents said that they have not traveled to Europe. If one of these respondents is randomly selected, what is the probability of getting someone who has traveled to Europe?

Outcome: selecting someone who has been to Europe 68 and not been to Europe 124.
Probabilities: P (traveled to Europe) =68/124

2. The data set represents the income levels of the members of a golf club. Find the probability that a randomly selected member earns at least $100,000.
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Each question has 3 possible answers.

Outcome: Random guesses on 3 possible answers
Probabilities: you would have a 1/3 or .33% chance of correctly answering each question. You would not combine the 4 questions because the questions are independent of each other.

6. Explain the difference between independent and dependent events.

Dependent events are linked to another event, while independent events are single events.

7. Provide an example of experimental probability and explain why it is considered experimental.

Experimental probability of an event is the ratio of the number of times the event occurs to the total number of trials.

Example: Patrick flipped a number cube 40 times. A 5 appeared 10 times. The experimental probability of rolling a 5 is 10 out of 40 or 25%

8. The measure of how likely an event will occur is probability. Match the following probability with one of the statements. There is only one answer per statement. 0 0.25 0.60 1 a. This event is certain and will happen every time.1 b. This event will happen more often than not. 0.60 c. This event will never happen. 0 d. This event is likely and will occur occasionally. 0.25
9. Flip a coin 25 times and keep track of the results. What is the experimental probability of landing on tails? What is the theoretical probability of landing on heads or tails?

Experimental probability: out of

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