Name Test IV Stat 341 Probability and Statistics Chapter 6 and 7 1-11: 6 points

Question

Name Test IV Stat 341 Probability and Statistics Chapter 6 and 7 1-11: 6 points 12-14: 10 points 15: 4 points 1. A numerical outcome of a probability experiment is called a Use this table for questions 2 and 3. 0 0.3 0.3 0.2 0.1 2. Based on the above probability distribution find P(1) 3. Based on the above probability distribution find P(2 or more) 4. Complete the following probability distribution: Grade Number of students obtaining grade P(Grade) 10 10 5 5. The sum of the probabilities in a discrete probability distribution must equal 6. The area under the entire probability density curve is equal to 7. In a nomal distribution the , and are equal to each other.

Explanation / Answer

1. Random variable

2. P(1) = 0.3

3. P(2 or more) = 1-[P(0) + P(1)] = 1-0.3-0.3 = 0.4

4. Total number of students = 35

P(A) = 5/35 = 1/7

P(B) = 10/35 = 2/7

P(C) = 10/35 = 2/7

P(D) = 5/35 = 1/7

P(E) = 5/35 = 1/7

5. 1

6. 1

7. mean,median,mode

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