A teacher gives a reading skills test to a third-grade class ofn = 25 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 showed an average improvement ofMD = 12.7 points withs 2 = 100.a. Are the results sufficient to conclude that there is significant improvement? Use a one-tailed test withα = .01.b. Construct a 90% confidence interval for the mean difference to describe the size of the improvement.(cannot use excel)

A teacher gives a reading skills test to a third-grade class of n = 25 at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of...

A teacher gives a reading skills test to a third-grade class ofn = 25 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 showed an average improvement ofM_D
= 12.7 points withs
² = 100.

a. Are the results sufficient to conclude that there is significant improvement? Use a one-tailed test withα = .01.

b. Construct a 90% confidence interval for the mean difference to describe the size of the improvement.

(cannot use excel)

Jun 03, 2022

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A teacher gives a reading skills test to a third-grade class of n = 25 at the beginning of the school year. To evaluate the changes that occur during the year, students are tested again at the end of...

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