The Data Fluency Inventory - Data Fluency: Empowering Your Organization with Effective Data Communication - page 220

3. Student race/ethnicity is a good example of which of the following?
a. A nominal dimension
b. An ordinal dimension
c. A ratio
d. An interval
e. A continuous dimension
Answer: a. Nominal dimensions deal with qualitative data that is assigned a
predetermined category that cannot be ranked. In this case, race/ethnicity
cannot be ranked with a certain racial/ethnic group above another.
4. A histogram of teacher value-added scores would be most useful in exam-
ining which of the following?
a. The number of teachers
b. The mean value of teacher value-added
c. The median value of teacher value-added
d. The distribution of teacher value-added
Answer: d. Histograms are designed to examine the distribution of scores.
And although the other information (that is, mean, median, and such)
can be provided in a histogram, their primary function is to examine data
distributions and spread.
5. Mr. Jones received his recent classroom observation score. He was told
he scored in the second quartile in his grade. Assume that the following
scores represent the values for the teachers in his grade:
7 5 3 10 15 6 12 9 14 16
Which score did Mr. Jones most likely receive?
a. 5
b. 10
c. 9
d. 3
Answer: c. 9
Rearranging the data in ascending order = 3 5 6 7 9 10 12 14 15 16:
The median value (50 th percentile) = 9.5.
The median value of the lower half of the data (25 th percentile) = 6.
Mr. Jones most likely scored between 6 and 9.5.
The best answer is 9.