what the error is:
a)
Grade Percent Frequency
A 20%
B 45%
C 30%
D 10%
F 5%
(b) The following table summarizes the grade breakdown on an exam in a small statistics class with 10 students.
Grade Percent Frequency
A 30%
B 35%
C 15%
D 20%
F 0%
The error in both tables lies in the frequency percentages.
In table (a), the sum of the frequency percentages exceeds 100%. The percentages are as follows:
- A: 20%
- B: 45%
- C: 30%
- D: 10%
- F: 5%
The total percentage is 20% + 45% + 30% + 10% + 5% = 110%, which is greater than 100%.
In table (b), the sum of the frequency percentages is less than 100%. The percentages are as follows:
- A: 30%
- B: 35%
- C: 15%
- D: 20%
- F: 0%
The total percentage is 30% + 35% + 15% + 20% + 0% = 100%, which is less than 100%.