College students from a random number Sukhothai two groups, one group of 10 people, and two of the eight test statistics. The same has scored 85 and 60 points respectively, and the average standard deviation of 5 and 7, respectively, assuming that the students in both groups. The normal distribution of the population The variances are equal. What about the differences in the average scores of students. Both the 99% confidence level.
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