A professor asked 12
of her students to estimate how many students attended class that day. Their estimates are shown in the table. Use the crowd-sourced data to estimate how many students attended class that day. Round your answer to the nearest whole number, if necessary.
118
131
96
140
125
108
124
112
120
132
134
109
Answer

To estimate how many students attended class that day using the crowd-sourced data, we can calculate the average (mean) of the estimates provided by the 12 students.

Here are the estimates:
118, 131, 96, 140, 125, 108, 124, 112, 120, 132, 134, 109

### Step 1: Sum of the estimates
\[
\text{Sum} = 118 + 131 + 96 + 140 + 125 + 108 + 124 + 112 + 120 + 132 + 134 + 109 = 1449
\]

### Step 2: Calculate the mean
\[
\text{Mean} = \frac{\text{Sum}}{\text{Number of estimates}} = \frac{1449}{12} \approx 120.75
\]

### Step 3: Round to the nearest whole number
\[
\text{Rounded estimate} = 121
\]

Therefore, the estimated number of students who attended class that day is **121**.

Would you like more details or have any questions? Here are some related questions to expand your understanding:

1. How is the mean different from the median in a dataset?
2. What is the importance of crowd-sourced data in estimating values?
3. How would the estimate change if an outlier were present in the data?
4. How do you calculate the median of a dataset?
5. What are other statistical methods to estimate the number of students in a class?

**Tip:** When dealing with data, always consider whether outliers might skew your results and whether another measure like the median might be more appropriate.

Learn how to estimate the number of students who attended class using crowd-sourced data. Calculate the mean of estimates provided by 12 students and round to the nearest whole number. Suitable for Grades 6-8.

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