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| Texting behavior | Talks on cell phone daily | Does not talk on cell phone daily | Total |
|---|---|---|---|
| Light | 110 | 146 | 256 |
| Medium | 139 | 164 | 303 |
| Heavy | 166 | 74 | 240 |
| Total | 415 | 384 | 799 |
In a study of cell phone use, 799 randomly selected US teens were asked how often they talked on a cell phone and about their texting behavior. The data are summarized in the table above. If one of the 799 teens surveyed is selected at random, what is the probability that the teen talks on a cell phone daily?
Difficulty: Easy
A:
$\frac{1}{799}$
B:
$\frac{415}{799}$
C:
$\frac{384}{415}$
D:
$\frac{384}{799}$
$$2, 9, 14, 23, 32$$
What is the mean of the data shown?
Difficulty: Easy
A:
14
B:
16
C:
17
D:
32
| Value | Frequency |
|---|---|
| 1 | $a$ |
| 2 | 2$a$ |
| 3 | 3$a$ |
| 4 | 2$a$ |
| 5 | $a$ |
The frequency distribution above summarizes a set of data, where $a$ is a positive integer. How much greater is the mean of the set of data than the median?
Difficulty: Hard
A:
0
B:
1
C:
2
D:
3
A band with 45 members has 11 members who play saxophone. If one band member is selected at random, what is the probability of selecting a band member who plays saxophone?
Difficulty: Easy
A:
$\frac{1}{45}$
B:
$\frac{11}{45}$
C:
$\frac{34}{45}$
D:
$\frac{45}{45}$
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