In a study conducted by some Statistics students, 73 people were randomly assigned to listen to rap music, music by Mozart, or no music while attempting to memorize objects pictured on a page. They were then asked to list all the objects they could remember. The summary statistics for each group are shown in the table. Complete parts a and b. OA. Ho: HM-HR=0 HA: HM-HR #0 C. Ho: HM-HR <0 HA: HM-HR=0 Test the hypothesis. t = ... (Round to two decimal places as needed.) = Count Mean SD a) Does it appear that it is better to study while listening to Mozart than to rap music? Test an appropriate hypothesis and state your conclusion. Let group M correspond to Mozart listeners and group R correspond to rap listeners. Write the null and alternative hypotheses. Choose the correct answer below. B. Ho: HM-HR=0 HA: HM-HR>0 Rap D. Ho: HM-HR=0 HA: HM-HR <0 Vi 33 10.88 3.71 . Mozart 20 10.15 3.04 No Music 20 (,) More 13.29 4.88 X

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