Question

7 1) Research has shown that activating negative stereotypes can have an effect on performance of complex tasks (Jones & 8 Joans, 1972). To test this phenomenon, a sample of n-25 female college students was given a mental rotation task at noon on one day and s again at noon on the following day. On the first day, the students simply completed the task. However, on the second day, a negative stereotype was activated 10 prior to the task by mentioning that females perform worse of mental rotation tasks than males. 11 For each student, the scores on the mental rotation task are provided. 12 What is the decrease in metal rotation ability after stereotype Stereotype Activation No Stereotype Activation 13 activation? Compute the following: Student Score Student Score 14 82 82 1 1 T 1) a point-estimate 85 2 100 88 85 17 68 2) a 99% confidence interval 83 4 83 18 83 86 86.32 83.28 3) a 80% confidence interval 85 6 91 6i 20 87 7 83 7 21 90 90 22 82 98 23 8C 10 92 10 24 RC 11 82 11 25 86 12 97 12 26 82 13 99 13 27 84 14 85 14 28 80 15 93 15 29 82 16 80 16 30 85 17 86 17 31 84 18 90 18 32 88 19 83 19 33 89 20 98 20 34 21 8C 21 35 85 22 84 22 38 86 95 23 87 37 24 92 24 89 25 84 25

Answer 1

Ans: point stimate x No sterotyp Actoa tion SterotyPe Actintion. Y = 88-구2 y E 84.8 Onknoon Conficenee Intew al tohen o xtt S S tor 9 Gontidente Iateroal for No Stuoty Aetieartion G1.20 8812-2.492 88. 12 t2-492 420 ) 5 Ce-18 ,10-25) ) For Sinilasly 8o C is N h (81.65, 958)

Now Condidence Tntewal tor Sterotype Activation (34.8-2.492 , 8.91 84.8+2. 492, 8. 7 80.30, 89.24 (3 Contidence Interval s (83.28, 86.32) 9. Gnfidence ntewal is rom tter deeang SteotyPe actioation Aad for 80 Confidence Intewal Saun that in mental otation lengtA af cI after steoty fe c is decsuare actioation.