| |
| |
1. |
A best-fit line drawn on a scatter plot ________ |
| |
|
A. |
must be drawn through the first and last data points. |
| |
|
B. |
approximates the linear relationship of data points. |
| |
|
C. |
always has a positive slope. |
| |
|
D. |
is a line that goes through every data point. |
| |
|
Hint |
|
| |
2. |
How do the medians of the two sets of exam scores compare? |
| |
|
 |
| |
|
A. |
The medians are equal. |
| |
|
B. |
The median of Exam A is greater than the median of Exam B. |
| |
|
C. |
The median of Exam A is less than the median of Exam B. |
| |
|
D. |
The answer cannot be determined since the median is not shown in a box and whisker plot. |
| |
|
Hint |
|
| |
3. |
How many lines are determined by 7 points, no three of which are collinear? |
| |
|
A. |
200 |
B. |
105 |
| |
|
C. |
42 |
D. |
21 |
| |
|
Hint |
|
| |
4. |
What is the probability of selecting 3 vowels at random from the word mathematics? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
5. |
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? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
6. |
How many different two-person teams can be made from 6 people? |
| |
|
A. |
30 |
B. |
120 |
| |
|
C. |
360 |
D. |
15 |
| |
|
Hint |
|
| |
7. |
The table shows the results when a number cube was rolled. What is the experimental probability of rolling an even number? |
| |
|
 |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
8. |
The table shows the results of rolling a number cube over three separate experiments. What is the experimental probability of rolling a number that is greater then or equal to five? |
| |
|
 |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
9. |
Suppose three coins are tossed. What is the probability that two will turn up heads, and one turn up tails? |
| |
|
A. |
0.625 |
B. |
0.375 |
| |
|
C. |
0.125 |
D. |
0.75 |
| |
|
Hint |
|
| |
10. |
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? |
| |
|
A. |
0.594 |
B. |
0.297 |
| |
|
C. |
0.152 |
D. |
0.149 |
| |
|
Hint |
|
| |
11. |
Suppose that the mean is 50. How many standard deviations away is the value 65? |
| |
|
A. |
about 1 standard deviation |
B. |
within 1 standard deviation |
| |
|
C. |
cannot be determined from given information |
D. |
about 2 standard deviations |
| |
|
Hint |
|
| |
12. |
A card is drawn at random from a standard deck of 52 playing cards. What is the probability that the card is red or a spade? |
| |
|
A. |
or  |
B. |
or  |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
13. |
Two cubes are rolled. What is the probability that the sum of the numbers is 4 or 7? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
14. |
Compute the variance and standard deviation for the set of {3, 4, 4, 7, 9, 9, 12, 16}. Round to the nearest tenth. |
| |
|
A. |
4.2; 2.0 |
B. |
16.5; 4.1 |
| |
|
C. |
15.8; 4.0 |
D. |
17.5; 4.2 |
| |
|
Hint |
|
|
|