A teacher gives a third grade class of n = 16 a reading skills test at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of the year. Their test scores revealed an average improvement of MD = 4.7 points A. If the variance for the difference scores is s2 = 144, are the results sufficient to conclude that there is significant improvement? Use a one-tailed test with α = .05. s² = ________________________________ SMD = ______________________________ tcritical = ___________________________ tcalculated = ___________________________ Decision = __________________________ B. If the variance for the difference scores is reduced to s2 = 64, are the results sufficient to conclude that there is significant improvement? Use a one-tailed test with α = .05. SMD = ______________________________ tcritical = ___________________________ tcalculated = ___________________________ Decision = __________________________
A teacher gives a third grade class of n = 16 a reading skills test at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of the year. Their test scores revealed an average improvement of MD = 4.7 points
A. If the variance for the difference scores is s2 = 144, are the results sufficient to conclude
that there is significant improvement? Use a one-tailed test with α = .05.
s² = ________________________________
SMD = ______________________________
tcritical = ___________________________
tcalculated = ___________________________
Decision = __________________________
B. If the variance for the difference scores is reduced to s2 = 64, are the results sufficient
to conclude that there is significant improvement? Use a one-tailed test with α = .05.
SMD = ______________________________
tcritical = ___________________________
tcalculated = ___________________________
Decision = __________________________
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