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1. |
Suppose you want to determine the favorite food of students in your school. Which would not provide a random sample? |
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A. |
surveying every fifth student to enter the school in the morning |
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B. |
surveying every tenth student on the school roster |
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C. |
surveying three students from each homeroom class |
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D. |
surveying customers at a nearby hamburger stand |
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Hint |
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2. |
Suppose you have a bag of numbered blocks 1–12. What is the probability of drawing a block with a prime number? |
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A. |
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B. |
 , or  |
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C. |
 , or  |
D. |
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3. |
The following table shows the results of rolling a number cube twenty times. What is the experimental probability of rolling a 4? |
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A. |
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B. |
 , or  |
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C. |
 , or  |
D. |
 , or  |
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Hint |
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4. |
Find the fair game. |
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A. |
Serena and Allie have two chips. One is red on one side and blue on the other side. The other chip is red on one side and green on the other side. Each girl tosses a chip. Serena scores one point if both chips match. Allie scores one point if the chips don't match. |
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B. |
Serena and Allie have two chips. Both chips are red on one side and blue on the other side. Each girl tosses a chip. Serena scores one point if a chip shows red. Allie scores one point if a chip shows blue. |
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C. |
Serena and Allie have two chips. One is red on both sides and one is red on one side and blue on the other side. Each girl tosses a chip. Serena scores one point if a chip shows red. Allie scores one point if a chip shows blue. |
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D. |
Serena and Allie have two chips. One is red on both sides and one is red on one side and blue on the other side. Each girl tosses a chip. Serena scores one point if both chips match. Allie scores one point if the chips don't match. |
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Hint |
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5. |
Suppose you have a bag filled with 6 blocks numbered from 1–6. You consecutively choose three blocks, without replacement to form a three-digit number. You choose the first number and put it in either the hundreds, tens, or ones place. You choose the next number and put it in one of the remaining places, and so on. The object of the game is to create the greatest three-digit number. What is the probability of getting a higher number in the third draw (than the second draw) if a 5 is in the tens place and the second draw is a 2? |
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A. |
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B. |
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6. |
Taylor and Isabel played a game with red, blue, white, and green balls. They had a bag with 10 balls. They took 4 samples of 4 balls at a time.
Sample 1: RRBB
Sample 2: BGRR
Sample 3: RWRB
Sample 4: RGBWFind the best estimate of the number of green balls in the bag. |
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A. |
9 |
B. |
3 |
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C. |
6 |
D. |
1 |
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7. |
What is the third quartile of this set of test scores?
63, 72, 74, 83, 91, 92, 95 |
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A. |
72 |
B. |
70 |
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C. |
93 |
D. |
92 |
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8. |
About what percentage of the test scores below are between 55 and 95? |
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ST10-001W-008550 |
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A. |
25% |
B. |
75% |
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C. |
60% |
D. |
50% |
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Hint |
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