=1 bo = y - bx y = bo + bix, 3) Let x have a mean of 7.2 and a standard deviation of 2.8. Let y have a mean of 12.6 and a standard deviation of 4.31. Let the correlation, r, between x and y be 0.41. Using the formulas above, calculate the regression coefficient, b, and the y-intercept, bo, for the regression model. (a) Write down the numerical values for both b and b. (b) Given the value that you obtained for b, how would you interpret this regression coefficient? PERCENTAGE POINTS OF THE t-DISTRIBUTION Tail Probabilities one Tail 10 6-95 0 - 025 0 - 61 6 - 005 Two Tails 002 190 -+ - - 3 1 2 --- HWWIOO W ! HNHI HNNNNO IO NWWWAOHIO AUNJONO! AMUMMMN OH MAMMAOZ H H H H N N N N N N N N N W WW WW WW .A D D D .D D V V V U Q Q Q J J O L O H N U J N O HN WWI OO W WW WW W WW WW WW WW WW WW WWWWWWWWWWWWWWAAAAAAAAVULGONH JI . . H H H H H H N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N NN NNNNNNWANI OC 00 0 60 6 6 60 6 6 6 6 OO OOO OOO HH HH HH HH N N NN WWWA AUTO JODH A JWWOOJIO N N N N N N N N N N W W W W W W W W W W W W W W w w w w ww ww ww ww wwwwWA P AVgoo IN WHOA JOH WO JOONAGOHA JOH WODHAJHUGDOWNONWOUWONWOA HUAUHONCHO JOO JOWOUTOHIO JUNINGODOWNOUAJHVOWWOO AUCH WAO JOHN WOO DONAU JONA OOH CONOH JANK WOODDOCOHN WWW w w w w w w w w w w w w w w w w w w w w w w w ww ww w ww wwwwAsA N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N W WW WW WW Ww wwAAA NPH