| |
| |
1. |
Find the standard deviation of the set {4, 7, 3, 8, 2, 6, 5, 8, 3, 2} to the nearest hundredth. |
| |
|
A. |
2.00 |
B. |
2.23 |
| |
|
C. |
2.35 |
D. |
2.46 |
| |
|
Hint |
|
| |
2. |
Find the standard deviation of the data in the stem-and-leaf plot to the nearest hundredth. |
| |
|
 |
| |
|
A. |
217.00 |
B. |
10.72 |
| |
|
C. |
11.74 |
D. |
228.50 |
| |
|
Hint |
|
| |
3. |
The enrollments at the University of Texas at Austin in some recent years were 47,905, 48,008, 48,857, 48,906, and 49,009. Find the standard deviation of the data. |
| |
|
A. |
452.93 |
B. |
434.00 |
| |
|
C. |
477.62 |
D. |
461.28 |
| |
|
Hint |
|
| |
4. |
Suppose that the mean is 50. How many standard deviations away is the value 65? |
| |
|
A. |
cannot be determined from given information |
B. |
about 1 standard deviation |
| |
|
C. |
about 2 standard deviations |
D. |
within 1 standard deviation |
| |
|
Hint |
|
| |
5. |
Compute the variance and standard deviation for the set of {284, 298, 302, 305, 310, 314, 321, 331, 337, 348}. Round to the nearest tenth. |
| |
|
A. |
337.9; 18.4 |
B. |
335.7; 18.3 |
| |
|
C. |
341.0; 18.5 |
D. |
289.2; 17.0 |
| |
|
Hint |
|
|
|