Question

test scores for all of the students in her class.
nis to select the words that make each statement true.
the untest data set represents the middle of the scores, and it is measure of statistical variability.
resents how far each score is from the average class score, and i a measure of statistical variability.

Explanation:

1. For the first blank: Measures of the middle (like mean, median, mode) are measures of central tendency, not variability. So the word "is not" fits here.
2. For the second blank: A measure of how far each score is from the average (like standard deviation, variance) is a measure of statistical variability. So the word "is" fits here (assuming the second statement's first part is about a variability measure, and we need to confirm it's a variability measure). But focusing on the first blank as per the visible part, the first statement's second part: since the middle of scores is central tendency, it's not a variability measure.

Answer:

For the first blank (in the visible statement: "the [blank] test data set represents the middle of the scores, and it [blank] a measure of statistical variability"): is not