Reference no: EM131108177
Question 1. The table shows the probability distribution for the number of heads when four coins are tossed. What is the probability that no more than two heads show on a random toss?
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X= number of heads
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Probability p(x)
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0
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0.0625
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1
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0.25
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2
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0.375
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3
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0.25
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4
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0.0625
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a) 0.3125
b) 0.375
c) 0.6875
d) 0.875
Question 2. On an algebra test, there are 7 students with As, 9 students with Bs, 11 students with Cs, 3 students with Ds, and 2 students with Fs. Find the probability that a randomly chosen student has D. Round to the nearest tenth of a percent.
a) 3%
b) 10.3%
c) 9.4%
d) 15.6%
Question 3. Which of the following could not be a probability distribution?
A)
| Outcomes |
Probability |
| 1 |
0.1 |
| 2 |
0.15 |
| 3 |
0.25 |
| 4 |
0.5 |
B)
| Outcomes |
Probability |
| 1 |
0.97 |
| 2 |
0.01 |
| 3 |
0.01 |
| 4 |
0.01 |
C)
| Outcomes |
Probability |
| 1 |
0.32 |
| 2 |
0.42 |
| 3 |
0.25 |
| 4 |
0.1 |
D)
| Outcomes |
Probability |
| 1 |
0.43 |
| 2 |
0.21 |
| 3 |
0.2 |
| 4 |
0.16 |
Question 4. Use the chart below. What is the probability that a randomly selected person has earned at least a bachelor's degree?
| X = Level of Education |
Probability |
| Some High School |
0.154 |
| High School Graduate |
0.32 |
| Some college |
0.172 |
| Associate's Degree |
0.082 |
| Bachelor's Degree |
0.179 |
| Advanced Degree |
0.093 |
A) 0.179
B) 0.272
C) 0.728
D) 0.907
Question 5. Use the chart below. In a given week, what is the probability that more than 300 CD's sell?
| Number of top 10 SDs Sold Each Week |
0-100 |
101-200 |
201-300 |
301-400 |
401-500 |
| Probability |
0.1 |
0.15 |
0.4 |
0.25 |
0.1 |
a) 0.40
b) 0.25
c) 0.75
d) 0.35
Question 6. Use the chart below. If a person is randomly selected, what is the probability that he or she has completed at most some college?
| X = Level of Education |
Probability |
| Some High School |
0.154 |
| High School Graduate |
0.32 |
| Some college |
0.172 |
| Associate's Degree |
0.082 |
| Bachelor's Degree |
0.179 |
| Advanced Degree |
0.093 |
a) 0.72
b) 0.474
c) 0.526
d) 0.646
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