Determine the null and alternative hypotheses based on the following: According to the Centers for Disease Control and Prevention, 19.6% of children aged 6 to 11 years are overweight. A school nurse thinks that the percentage of 6- to 11-year-olds who are overweight is different in her school district.

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A: We have given that  Sample size n =50 Favorable cases x=31 Sample proportion p^=x/n  =31/50 =0.62