# Answer to Question #41939 in Statistics and Probability for surya

Question #41939

A random sample of 10units of mobile phone batteries from manufacturer A gave a lifetime with standard deviation of 5 months while a random sample of 13 units of batteries from manufacturer B gave a lifetime with standard deviation of 4 months. Assume the population to be approximately normal with equal variances. Use a 0.10 level of significance.

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