One study, based on responses form 1,021 randomly selected teenagers, concludes that 43% of teenagers cite grades as their greatest source of…

One study, based on responses form 1,021 randomly selected teenagers, concludes that 43% of teenagers cite grades as their greatest source of pressure. Use a 0,05 significance level to claim that fewer than half of all teenagers in the population feel that grades are their greatest source of pressure. Formulate the null and alternative hypotheses. Got that which is Ho_p=0.5 Hap<0.5. What is the z and following questions
 
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