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ULUIU. 0.04 UIT DE 9 of 9 (9 complete) > * 12.1.17 HW Score: 96%, 8.64 of Question Help Does the location of your seat in a classroom play a role in attendance of grade 1000 starts in a physics course were randomly assigned to one of four groups. The 100 students in group 1 satom eters from the front the class, the 400 students in group 2 sat 4 to 6.5 meters from the front, the 400 shidants in group at 5 to 9 meters from the front and the 400 students in group 4 st 9 to 12 meters from the front Complete parts through (c) Click the icon to view the chi-square table of critical values Is there a significant difference in attendance patterns? Recall that 0.01 A Yes, because the value of the test is less than the level of significance No, because the P value of the test is less than the level of significance C. No, because the P-value of the test is greater than the level of significance. D. Yes, because the P-value of the test is greater than the level of significance C (c) At the end of the semester, the proportion of students in the top 20% of the class was determined of the students in group 1,25% were in the top 20% of the students in group 2, 20% were in the top 20% of the students in group 3, 18% were in the top 20% of the students in group 4, 10% were in the top 20%. How many students would we expect to be in the top 20% of the classif seat location plays a role in grades? The number of students expected to be in the top 20% of the class in group 1 il seat location plays no role on grades is 100 The number of students expected to be in the top 20% of the class in group 2 is 80 The number of students expected to be in the top 20% of the class in group is 84 The number of students expected to be in the top 20% of the class in group 4 is Enter your answer in the edit fields and then click Check Answer Check Answer 4 4 parts remaining

Answer 1

Answer

Given that sample size n is same for 4 groups, i.e. n = 400

Proportions for each group are p1 = 0.25, p2 = 0.2, p3 = 0.16 and 0.19

Expected for group 1 = n*p1

= 400*0.25

= 100

Expected for group 2 = n*p2

= 400*0.20

= 80

Expected for group 3 = n*p3

= 400*0.16

= 64

Expected for group 4 = n*p4

= 400*0.19

= 76