Claim: The standard deviation of pulse rates of adult males is less than 12 bpm. For a random sample of 156 adult males, the pulse rates have a standard deviation of 11.7 bpm. Complete parts (a) and...

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Extracted text: Claim: The standard deviation of pulse rates of adult males is less than 12 bpm. For a random sample of 156 adult males, the pulse rates have a standard deviation of 11.7 bpm. Complete parts (a) and (b) below. a. Express the original claim in symbolic form. 6 < 12="" bpm="" (type="" an="" integer="" or="" a="" decimal.="" do="" not="" round..)="" b.="" identify="" the="" null="" and="" alternative="" hypotheses.="" họ:="" bpm="" bpm="" (type="" integers="" or="" decimals.="" do="" not="" round.)="">