Ch $09$: Mastery Assignment $-$ Hypothesis Tests $<$ Back to Assignment Attempts: Average: $/11.$ Developing the null and alternative hypotheses, Type I and II errors, interpreting p$-$values A finance professor conducts a statistical study to test her hunch that the mean return on common$-$stock portfolios is lower with a trading strategy than with a buy$-$and$-$hold strategy. The professor formulates the null hypothesis as: The mean return on common$-$stock portfolios is the same with a trading strategy as with a buy$-$and$-$hold strategy. The mean return on common$-$stock portfolios is lower with a trading strategy than with a buy$-$and$-$hold strategy. The mean return on common$-$stock portfolios is higher with a trading strategy than with a buy$-$and$-$hold strategy. The mean return on common$-$stock portfolios is higher or the same with a trading strategy as opposed to a buy$-$and$-$hold strategy. Grade It Now Save & Continue Continue without saving