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To calculate the mean number of chocolate bars eaten per week, we use the formula for the weighted mean:

\[
\text{Mean} = \frac{\sum (\text{Chocolate bars eaten} \times \text{Frequency})}{\sum (\text{Frequency})}
\]

From the table:
- For 3 chocolate bars, the frequency is 6.
- For 4 chocolate bars, the frequency is 16.
- For 5 chocolate bars, the frequency is 18.

First, let's compute the sum of the products of the chocolate bars eaten and their frequencies.

\[
(3 \times 6) + (4 \times 16) + (5 \times 18)
\]

Next, compute the total frequency:

\[
6 + 16 + 18
\]

Let me calculate that for you.The mean number of chocolate bars eaten per week is **4.3**.

Would you like more details or have any questions?

Here are some related questions to expand your understanding:
1. How do you calculate the median in a frequency distribution?
2. What is the difference between the mean and the mode?
3. How can you calculate the variance and standard deviation for this dataset?
4. What is a weighted mean, and how does it apply in this scenario?
5. How would the mean change if the frequency distribution was skewed?

**Tip:** Always double-check the total frequency when calculating the weighted mean to ensure accuracy.

A survey asked a group of people how many chocolate bars they eat each week. The results from the survey are shown in the table below. What is the mean number of chocolate bars eaten? Give your answer as a decimal.

Learn how to calculate the mean number of chocolate bars eaten per week based on a frequency distribution table. This problem covers basic statistical concepts such as the weighted mean and is suitable for students in Grades 6-8.

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