Question: As the following chart shows, what is good enough to qualify as proficient may vary widely from state to state. Education Week compared the percent

As the following chart shows, what is €œgood enough€ to qualify as €œproficient€ may vary widely from state to state. Education Week 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 a = 0.05

Statewide NAEP Statewide NAEP State Assessment AssessmentState Assessment Assessment AR CT GA 65 84 15 28 25 23 18 30 62 16 39 12 40 75 37 32 NC 18 ND 21 30 SC 14 24 43 38 27 29 25 MA 29 WY 23

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a There appears to be very little relationship between the two sets of percentages Some of the large... View full answer

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