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Statistics

A sample of 36 male lions had an average weight of 450kg with a variance of 70. A sample of 149 female lions had an average weight of 250kg with a variance of 40. A sample of 42 male tiger found an average wight of 550kg with a variance of 55. A sample of 72 female tigers found an average wight of 450kg with a variance of 48. Test the hypothesis that there is no difference between the difference between male and female lions and male and female tigers?

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