The frequency distribution below shows the distribution for checkout time (in minutes) in UMUC MiniMart between 3:00 and 4:00 PM on a Friday afternoon.
| Checkout Time(in minutes) |
Frequency |
Relative Frequency |
| 1.0-1.9 |
3 |
|
| 2.0-2.9 |
12 |
|
| 3.0-3.9 |
|
0.2 |
| 4.0-4.9 |
3 |
|
| 5.0-5.9 |
|
|
| Total |
25 |
|
Complete the frequency table with frequency and relative frequency. Express the relative frequency to two decimal places.
What percentage of the checkout times was at least 3 minutes?
In what class interval must the median lie? Explain your answer.
Does this distribution have positive skew or negative skew? Why?