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 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


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  • CreatedAugust 28, 2015
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