psychology students took a standardized test. The scores are summarized in the GFDT below.
Scores | Frequency |
---|---|
180 - 199 | 11 |
200 - 219 | 18 |
220 - 239 | 12 |
240 - 259 | |
260 - 279 | 13 |
280 - 299 | 52 |
The scores are also described in the cumulative table shown below.
Scores | Frequency |
---|---|
less than 200 | 11 |
less than 220 | 29 |
less than 240 | 41 |
less than 260 | 55 |
less than 280 | 68 |
less than 300 | nn |
What is the missing value in the GFDT?
answer =
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