Untitled Document

ACTIVITY

Suppose that you wish to compare a new method of teaching reading to "slow learners" to the current standard method. You decide to base this comparison on the results of a reading test given at the end of a learning period of 6 months. Of a random sample of 22 slow learners, 10 are taught by the new method and 12 are taught by the standard method. The results of the reading test at the end of this period are given in the following table.

New Method (1)	Standard Method (2)
80	79
80	62
79	70
81	68
76	73
66	76
71	86
76	73
70	72
85	68
	75
	66

a. Do the data support the hypothesis that two methods are different? Use a significance level of 0.05.

Step 1: Make sure that "Input" menu option is selected.
Step 2: Click on "Col_1" and replace it with "New Method".
Step 3: Enter the data for the New Method.
Step 4: Click on "Col_2" and replace it with "Standard Method".
Step 5: Enter the data for the Standard Method.
Step 6: Click on the right arrow at the upper right corner until you see "Rank test".
Step 7: Select the "W-test" from menu options.

The output will include: Sample sizes, Medians, and the results of the Wilcoxon rank sum test

Report the p-value of the test and present you conclusion.

b. Do the data support the hypothesis that the population maen reading score for slow learners taught by the new method is greater than the mean reading score for those taught by the standard method? Use the significance level of 0.01.

Step 1: Make sure that "Input" menu option is selected.
Step 2: Click on "Col_1" and replace it with "New Method".
Step 3: Enter the data for the New Method.
Step 4: Click on "Col_2" and replace it with "Standard Method".
Step 5: Enter the data for the Standard Method.
Step 6: Click on the right arrow at the upper right corner until you see "Rank test".
Step 7: Select the "W-test" from menu options.Do not use the ouput yet.
Step 8: Click on the "Options" button on the upper right hand side of the window.
Step 9: Select "Greater than" option for the "Alt. hypothesis".
Step 10: Type "1.0" in the "Alpha" box.
Step 11: Click on the "OK" button.

The output will include: Sample sizes, Medians, and the results of the Wilcoxon rank sum test

Report the p-value of the test and present you conclusion.