The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level and a score of 299 is "proficient." Scores for a random sample of 1 100 eighth-gr ders in Dallas had 271 with standard error 1.3.

(a) We don't have the 1100 individual scores, but use of the t procedures is surely safe. Why? O

A. Because the sample size is very large.

B. Because the sample doesn't have outliers.

C. Because the data haya strong skew.

D. Because use of the t procedures is always safe.

Question

Martin Mccall

Mathematics

14 April, 22:08

The Trial Urban District Assessment (TUDA) is a government-sponsored study of student achievement in large urban school districts. TUDA gives a mathematics test scored from 0 to 500. A score of 262 is a "basic" mathematics level and a score of 299 is "proficient." Scores for a random sample of 1 100 eighth-gr ders in Dallas had 271 with standard error 1.3.

(a) We don't have the 1100 individual scores, but use of the t procedures is surely safe. Why? O

A. Because the sample size is very large.

B. Because the sample doesn't have outliers.

C. Because the data haya strong skew.

D. Because use of the t procedures is always safe.

+4

Answers (1)

Know the Answer?

Isabelle Sexton · Answer 1

A. Because the sample size is very large.

Step-by-step explanation:

The sample is quite large, so the t test is safe. With a sample size of at least 100, this test is going to be safe.

So the correct answer is:

A. Because the sample size is very large.