I need help with this question please! You are designing a study to be evaluated with a two-sample nondirectional independent t test at ?. = .05. You want .90 power. You expect Cohen's d to be about .40. How many subjects will you need per group? I need to use table 33.1.

Table 33.1 Sample Size Needed per Group to Obtain .80 or .90 Power, Given Various Cohen's ds or Effect Size rs, for a Two-Sample Independent t Test With Equal Sample Sizes and .05 Nondirectional. a Cohen's d E'l'cr Site r .80 PORT? .90 Pouw .m .063 1.5?! 2.102 .20 Ijslualli .141\" smalll W} 535 .30] . 143 I 75 234 .4\" . l 96 99 [32 .50 [medium] .343 unedium'l (v4 3'? .61] .387 45 59 .71) .3 3U 33 44 .SI} (Luge) \"'71 (large) .35 34 .90 44- I 7 32 LOO .5 H II l6 SOURCE: Adapted 'om Cohen (1988). Table 33.2 Sample Size Needed per Group to Obtain .80 or .90 Power, Given Various Effect Size ns, for an Independent Sample's One-Way ANOVA With Equal Sample Sizes and .05 a .80 mer .90 mer Number of Groups Number of G maps Effect Six 1'] 3 4 5 3 4 5 . I (no gulmll'l :32 3'1 340 41 T :50 3 1 0 J96 SD 68 {10 106 38 7'8 .24 3 (medium? 52 44 39 68 58 50 .287 5r: 3] 2!\" 4H 44) 55 .371 (hr-gel ll IS It? 27 33 20 .44' 14 I1 I l 18 15 3 . 5 '7 3 35 T b l U 9 8 Table 33.3 Total Sample Size Needed to Obtain .80 or .90 Power, Given Various Effect Size q) s or Vs, for a Two-Variable Chi-Square Test of Independence at .05 a and 1 to 5 df .50 Power .90 Paurr Erin-mum r 1.35 mg 3df 4d)\" Sdf Idf 2dr 3df 44;" w .n'm usmalll \"as; w) .21le 1% 340 3'1 3:10 322 1:53 {31] 3 m 38$: 41'- .3(H} medium; SS I08 110 134 143 11? I40 I60 1'0 [SS .404} 49 (a!) 63 7'5 80 (its $0 90 Q\" 104 5\"\" ihrgci ,il 33 44 45 5' 43 5') -- {:02 (1'3 SOURCE: Adapted from Cohen (1988)