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1. A random sample of 1000 workers from south India show that their mean wages are Rs. 47 per week with a standard deviation of

1. A random sample of 1000 workers from south India show that their mean wages are Rs. 47 per week with a standard deviation of Rs. 28. A random sample of 1500 workers from North India gives a mean wage of Rs. 49 per week with a standard deviation of Rs. 40. Is there any significant difference between their mean level of wages

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