Question: A recreational therapist knows the U.S. population mean and standard deviation for scores on an interval-level risk-taking scale. She obtains a random sample of people

A recreational therapist knows the U.S. population mean and standard deviation for scores on an interval-level risk-taking scale. She obtains a random sample of people who enjoy riding roller coasters at amusement parks and has them complete the risk-taking scale. What statistical test should she use to see if roller coaster riders differ in the mean level of sensation- seeking from the general population?

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