3. Your friend claims that his "lucky socks” helps him win more when gambling. To test if this charm truly is lucky, you

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3 Your Friend Claims That His Lucky Socks Helps Him Win More When Gambling To Test If This Charm Truly Is Lucky You 1 (197.2 KiB) Viewed 328 times

3. Your friend claims that his "lucky socks” helps him win more when gambling. To test if this charm truly is lucky, your friend goes to Las Vegas and plays for 5 days with the “lucky socks” and for 5 days without them. His winnings are in the following table. Negative winnings mean he lost money that day. Without Lucky Socks (Group 1) With Lucky Socks (Group 2) -17 -22 -15 -18 20 25 -35 180 28 210 Group 1 mean = -3.8 Group 1 SD = 26.7 Group 2 mean = 75 Group 2 SD = 111.6 Your friend says, "My average winnings with the lucky socks is $75, but without it, my average is negative $3.80. This is proof that the charm works." Now perform a Wilcoxon-Mann-Whitney test. What are the appropriate hypotheses? OH : Mi - H2 = 0 HA: HI-1270 OH : Mi - H2 = 0 HAM - 12