The intelligence quotients (IQs) of 16 students from one area of a city showed a mean of 107 and a standard deviation of 10, while IQ of 14 students from another area of the city showed a mean of 112 and a standard deviation of 8. Is there a significant difference between IQs of the two groups at significance level of (a) 0.01 and (b) 0.05?
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