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1. |
Find the median for the set of data shown below. |
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A. |
6.8 |
B. |
19 |
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C. |
9.75 |
D. |
8 |
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Hint |
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2. |
Find the standard deviation of the set {15, 42, 30, 22, 19, 32} to the nearest hundredth. |
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A. |
10.14 |
B. |
9.05 |
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C. |
10.03 |
D. |
9.91 |
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Hint |
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3. |
The weights of the babies born in Martin County Hospital are normally distributed with a mean of 119 ounces and a standard deviation of 20 ounces. What percent of the babies have a birth weight between 59 and 179 ounces? |
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A. |
99% |
B. |
95% |
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C. |
100% |
D. |
68% |
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Hint |
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4. |
The letters a, b, c, and d will be used to form passwords for the school's computer system. How many 4-letter passwords may be formed if the letters can be used more than once in any password? |
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A. |
300 |
B. |
16 |
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C. |
20 |
D. |
256 |
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Hint |
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5. |
Kim needs to choose a 4-digit personal identification number (PIN) to use with her phone card. She may use a digit only once. How many different PINs can she choose from? |
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A. |
8020 |
B. |
5040 |
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C. |
5610 |
D. |
900 |
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Hint |
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6. |
Evaluate  |
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A. |
 |
B. |
 |
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C. |
 |
D. |
4,032 |
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Hint |
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7. |
The calculus class is preparing for the Advanced Placement Exam. If there are 12 girls in a class of 20, how many study groups of 3 girls and 2 boys can be formed? |
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A. |
110 |
B. |
8395 |
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C. |
5670 |
D. |
6160 |
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Hint |
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8. |
Kim has 3 blue sweaters, 2 red sweaters, and 5 white sweaters in a dresser drawer. If she selects 3 sweaters at random with replacement, what is the probability she will select a red one first, white second, and blue third? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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9. |
A bag contains 7 blue marbles, 8 green marbles, 15 red marbles, and 10 yellow marbles. Find the probability of randomly drawing without replacement, a blue marble and then a red. |
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A. |
 or about 0.0438 |
B. |
 or about 0.0673 |
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C. |
 or about 0.2273 |
D. |
 or about 0.0656 |
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Hint |
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10. |
The probability of a basketball player making a free throw during the regular season is  . During a championship game, this player made two out of three attempts. Based on his regular season record, what was the probability of making two out of three attempts? |
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A. |
 or about 0.6944 |
B. |
 or about 0.1389 |
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C. |
 or about 0.2778 |
D. |
 or about 0.3472 |
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Hint |
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11. |
42% of a random sampling of 800 people felt that skim milk was as nutritional as whole milk. Find the margin of error for this sampling. |
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A. |
0.0348999 |
B. |
0.2436 |
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C. |
0.58 |
D. |
0.0003045 |
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Hint |
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12. |
Elizabeth has 12 female friends and 10 male friends. If she is having an eight-person party, what is the probability that there will be 5 girls and 3 boys, if she chooses people at random? |
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A. |
0.149 |
B. |
0.152 |
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C. |
0.297 |
D. |
0.594 |
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Hint |
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13. |
According to NFL statistics, the Cincinnati Bengals will be blown out in 5 out of 16 games, regardless of opponent. What are the odds of Cincinnati playing a close game? |
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A. |
16:5 |
B. |
11:5 |
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C. |
11:16 |
D. |
5:11 |
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Hint |
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14. |
Max gets to choose 6 balloons from a group of 10 red balloons and 15 blue balloons. What is the probability that at least 4 balloons are red? |
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A. |
0.023 |
B. |
0.147 |
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C. |
0.057 |
D. |
0.125 |
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Hint |
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15. |
There are 25 things that can break on a car. Seven are maintenance problems, 14 are small repairs, and 4 are major problems. If a problem occurs at random, what is the probability that it is not a major problem? |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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16. |
Describe the set of data
{33, 35, 38, 44, 45, 45, 46, 46, 46, 47}. |
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A. |
positively skewed |
B. |
normal distribution |
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C. |
negatively skewed |
D. |
cannot be determined |
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Hint |
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17. |
Suppose a mathematician has a  probability of answering any math question correctly. What is the probability that he answers exactly 3 out of 5 math questions correctly? |
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A. |
0.0729 |
B. |
0.0081 |
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C. |
0.54 |
D. |
0.328 |
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Hint |
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18. |
In order to determine what American people like to do, a group of 100 random American men were asked what their hobbies were. Is this a random sample? If not, why is it not? |
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A. |
yes |
B. |
no, because no women are included |
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C. |
no, because it only includes Americans |
D. |
no, because it is based on opinion |
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Hint |
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