14.65 [EX14-65] As the following chart shows, what is “good enough” to qualify as “proficient”

may vary widely from state to state. Education Week

(February 20, 2002) compared the percent of students who scored at or above proficient on the National Assessment of Educational Progress (NAEP)

and on state assessments in mathematics.

a. Present the information in the table in the form of a bar graph to visualize any relationship between the two different assessments.
Does there appear to be any relationship? Explain.

b. Find the rank numbers for each set of percentages separately.

c. Present the information in the table in the form of a scatter diagram to visualize any relationship between the two different assessments. Does there appear to be any relationship?
Explain.

d. Use the Spearman rank correlation coefficient to test the hypothesis that there is no correlation between the two sets of percentages. Use 0.05.

Transcribed Image Text:

Statewide NAEP Statewide NAEP State Assessment Assessment State Assessment Assessment AR 41 CT 30 GA 62 ID 16 KS 39 LA 12 MA 40 MI 75 MO 37 326231322 NY 65 22 NC 84 28 18 ND 15 25 RI 28 23 30 SC 24 18 14 TX 43 VT 38 29 WY 27 222 27 29 25