Question: Which statement is the best example of a null hypothesis? Teenagers who sleep at least 8 hours a night do not have a higher IQ

Which statement is the best example of a null hypothesis? Teenagers who sleep at least 8 hours a night do not have a higher IQ score than teenagers who do not. Teenagers who sleep at least 8 hours a night have higher IQ scores than teenagers who do not or Teenagers who sleep at least 8 hours a night have significant increases in IQ scores than teenagers who do not or Teenagers who sleep at least 8 hours a night have lower IQ scores than teenagers who do not

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