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1. |
A best-fit line drawn on a scatter plot ________ |
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A. |
always has a positive slope. |
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B. |
approximates the linear relationship of data points. |
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C. |
is a line that goes through every data point. |
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D. |
must be drawn through the first and last data points. |
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Hint |
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2. |
Choose the scatter plot that has a prediction equation with a negative slope. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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3. |
The scores on a national achievement test are normally distributed with a mean of 50 and a standard deviation of 10. Out of a group of 200 students, how many would you expect to score more than 70? |
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A. |
10 |
B. |
32 |
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C. |
1 |
D. |
5 |
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Hint |
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4. |
What is the probability of selecting 3 vowels at random from the word mathematics? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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5. |
Find 8P3. |
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A. |
24 |
B. |
336 |
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C. |
1,680 |
D. |
21 |
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Hint |
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6. |
A briefcase combination lock contains 4 digits. Each digit is a number between 0 and 9. How many different combinations are possible if each number can only be used once? |
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A. |
10,000 |
B. |
7,200 |
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C. |
5,040 |
D. |
40 |
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Hint |
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7. |
A bag contains 10 red marbles, 5 gray marbles, 12 black marbles, and 8 white marbles. Two marbles are randomly drawn from the bag without replacement. What is the probability of drawing a black marble followed by a red marble? |
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A. |
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B. |
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C. |
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D. |
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8. |
A number cube is rolled and a coin is tossed. What is the probability of rolling a 5 and tossing tails? |
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A. |
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B. |
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D. |
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Hint |
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9. |
What is the probability of randomly drawing a ten or a club from a standard deck of 52-playing cards? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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10. |
The table shows the results when a number cube was rolled. What is the experimental probability of rolling a three? |
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A. |
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B. |
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C. |
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Hint |
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11. |
The table shows the results of rolling a number cube over three separate experiments. What is the experimental probability of rolling a four? |
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A. |
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B. |
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C. |
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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. |
0.594 |
B. |
0.152 |
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C. |
0.149 |
D. |
0.297 |
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Hint |
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13. |
Martha goes to the dentist and finds out that she has five cavities. If she has 16 upper teeth and 16 lower teeth, what is the probability that all five cavities are on the upper teeth? |
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A. |
0.11 |
B. |
0.022 |
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C. |
0.011 |
D. |
0.22 |
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Hint |
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14. |
Which of the graphs will have the lowest standard deviation? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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