A national study that examined attitudes about antidepressants revealed that approximately 70% of respondents believe "antidepressants do not really cure anything, they just cover up the real trouble." If X represents the number of people who believe that antidepressants do not cure but only cover up the real problem, find the mean and variance of X when 7 people are selected at random. The mean is . (Type an integer or a decimal. Do not round.) The variance is. (Type an integer or a decimal. Do not round.)

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