Reading scores. A class of fourth graders takes a diagnostic reading test, and the scores are reported by reading grade level. The 5-number summaries for the 14 boys and 11 girls are shown:
|
Boys:
|
2.0
|
3.9
|
4.3
|
4.9
|
6.0
|
|
Girls:
|
2.8
|
3.8
|
4.5
|
5.2
|
5.9
|
a) Which group had the highest score?
b) Which group had the greatest range?
c) Which group had the greatest interquartile range?
d) Which group s scores appear to be more skewed? Explain.
e) Which group generally did better on the test? Explain.
f) If the mean reading level for boys was 4.2 and for girls was 4.6, what is the overall mean for the class?