Question

Here are the math test scores of 10 randomly selected students from Class 1 and Class 2.
Class 1: 75 | 80 | 84 | 79 | 92 | 86 | 88 | 86 | 86 | 90
Class 2: 83 | 85 | 91 | 93 | 72 | 85 | 76 | 80 | 82 | 89
Find the mean score of each sample. Based on the mean, which class generally performed better on the math test?

The mean score for Class 1 is __. The mean score for Class 2 is __. Based on the mean, Class 1 generally performed better on the math test.

class 1 did better what are the mean scores

Answer 1

To calculate the mean score for each class, you need to sum all the scores and then divide by the number of students.

**Class 1 Scores:**
75, 80, 84, 79, 92, 86, 88, 86, 86, 90

**Sum of Class 1 Scores:**
75 + 80 + 84 + 79 + 92 + 86 + 88 + 86 + 86 + 90 = 879

**Mean for Class 1:**
\[
\text{Mean} = \frac{\text{Total Sum}}{\text{Number of Students}} = \frac{879}{10} = 87.9
\]

**Class 2 Scores:**
83, 85, 91, 93, 72, 85, 76, 80, 82, 89

**Sum of Class 2 Scores:**
83 + 85 + 91 + 93 + 72 + 85 + 76 + 80 + 82 + 89 = 885

**Mean for Class 2:**
\[
\text{Mean} = \frac{\text{Total Sum}}{\text{Number of Students}} = \frac{885}{10} = 88.5
\]

Thus, the mean scores are:

- The mean score for Class 1 is **87.9**.
- The mean score for Class 2 is **88.5**.

Based on the mean scores, Class 2 generally performed better on the math test, not Class 1.