Homework SourseStudents earned the following scores on a 10pt statistics qu
Students earned the following scores on a 10-pt statistics quiz. Find the mean score given the following frequency distribution. 6.47 5.05 5.81 7.88
Solution
Hence Option a is correct
| Dear Student | ||||||||||
| Thank you for using Chegg !! | ||||||||||
| Given the following data | ||||||||||
| Score (xi) | No.Of students (yi) | |||||||||
| 1 | 4 | 4 | ||||||||
| 2 | 5 | 10 | ||||||||
| 3 | 3 | 9 | ||||||||
| 4 | 6 | 24 | ||||||||
| 5 | 9 | 45 | ||||||||
| 6 | 10 | 60 | ||||||||
| 7 | 8 | 56 | ||||||||
| 8 | 7 | 56 | ||||||||
| 9 | 12 | 108 | ||||||||
| 10 | 12 | 120 | ||||||||
| Now mean is given by | ||||||||||
| Mean | = | xi.yi / yi | ||||||||
| = | (1*4 + 2*5 + 3*3 + 4*6+ 5*9+ 6*10 + 7*8 + 8*7+9*12 + 10*12)/4+5+3+6+9+10+8+7+12+12) | |||||||||
| = | 6.473684 | |||||||||
