EM-3012
Measures of spread
E Math · Secondary 4 · Medium · Measures of spread
The grouped frequency table shows the Mathematics test scores of 40 students.
- 0 ≤ x < 5 : 6 students
- 5 ≤ x < 10 : 10 students
- 10 ≤ x < 15 : 14 students
- 15 ≤ x ≤ 20 : 10 students
Using the midpoints of each class, estimate the standard deviation of the scores, correct to 1 decimal place.
- 0 ≤ x < 5 : 6 students
- 5 ≤ x < 10 : 10 students
- 10 ≤ x < 15 : 14 students
- 15 ≤ x ≤ 20 : 10 students
Using the midpoints of each class, estimate the standard deviation of the scores, correct to 1 decimal place.
- 5.0
- 4.7
- 3.8
- 6.2
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.