| |
| |
1. |
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? |
| |
|
A. |
32 |
B. |
5 |
| |
|
C. |
1 |
D. |
10 |
| |
|
Hint |
|
| |
2. |
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. |
| |
|
A. |
 or about 0.0656 |
B. |
 or about 0.0438 |
| |
|
C. |
 or about 0.2273 |
D. |
 or about 0.0673 |
| |
|
Hint |
|
| |
3. |
For which scatter plot will a good line of fit have a negative y-intercept? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
4. |
A line of fit is drawn on a scatter plot showing the number of pets owned by automobile owners and the number of miles driven each month. What would probably be the best description of the slope of this line? |
| |
|
A. |
undefined |
B. |
zero |
| |
|
C. |
negative |
D. |
positive |
| |
|
Hint |
|
| |
5. |
Find 12P4. |
| |
|
A. |
95,040 |
B. |
19,958,400 |
| |
|
C. |
42 |
D. |
11,880 |
| |
|
Hint |
|
| |
6. |
How many different ways can a coach make a team of 18 players from a tryout of 20 people? |
| |
|
A. |
190 |
B. |
3,420 |
| |
|
C. |
6,840 |
D. |
380 |
| |
|
Hint |
|
| |
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 gray marble followed by another gray marble? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
8. |
Two number cubes are rolled. What is the probability of rolling a sum of 9 or a sum that is even? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
9. |
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 |
|
| |
10. |
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 |
|
| |
11. |
Suppose three coins are tossed. What is the probability that two will turn up heads, and one turn up tails? |
| |
|
A. |
0.125 |
B. |
0.75 |
| |
|
C. |
0.375 |
D. |
0.625 |
| |
|
Hint |
|
| |
12. |
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? |
| |
|
A. |
0.022 |
B. |
0.22 |
| |
|
C. |
0.11 |
D. |
0.011 |
| |
|
Hint |
|
| |
13. |
One card is drawn from a standard deck of cards. What is the probability that it is either a black card or a face card? |
| |
|
A. |
 |
B. |
 |
| |
|
C. |
 |
D. |
 |
| |
|
Hint |
|
| |
14. |
Compute the variance and standard deviation for the set of {7,7,7,7}. Round to the nearest tenth. |
| |
|
A. |
0; 28 |
B. |
0; 7 |
| |
|
C. |
0; 0 |
D. |
7; 0 |
| |
|
Hint |
|
|
|