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Several programs attempt to address the shortage of qualified teachers by placing uncertified instructors in schools with acute needs often in inner cities. A 1999 2000 study compared students taught by certified teachers to others taught by uncertified teachers in the same schools.
Reading scores of the students of certified teachers averaged 35.62 points with standard deviation 9.31. The scores of students instructed by uncertified teachers had mean 32.48 points with standard deviation 9.43 points on the same test. There were 44 students in each group. The appropriate t procedure has 86 degrees of freedom.
Is there evidence of lower scores with uncertified teachers? Discuss. (The Effectiveness of Teach for America and Other Under-certified Teachers on Student Academic Achievement: A Case of Harmful Public Policy. Education Policy Analysis Archives [2002])
Choose one of these tests and describe in your own words, the purpose of the test, any particular assumptions or limitations pertaining to the test, and provide an example where you could employ the test.
Complete a correlation on the data (StatTools: Summary Statistics/Correlation and Covariance/Correlation/Entries below the diagonal only).
a researcher notes that the correlation in the group she studies is so large that if there were not a correlation among
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testing equality of two means.an independent testing agency has been contracted to determine whether there is any
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question computer city has compiled the following sales data regarding the number of computers sold each day for the
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