An instructor wishes to determine which of two methods is more effective in teaching a certain concept ins Statistics. In a class of 36 students, he used Method A and in another class of 40 students, he use Method B. at the end of the lesson, he gave the two classes the same examination and obtained the following results:
Method A
x¯¯¯=78
sA=4
Method B
x¯¯¯=70
sB=6
Is he/she correct in assuming that Method A is more effective than Method B? Use 0.01 level of significance.
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