To find the relative frequency of people who have 2 children, we need two pieces of information from the histogram:

1. The frequency of people with 2 children.
2. The total number of people surveyed.

Step 1: Find the frequency of people who have 2 children.

From the histogram:

• The bar representing people with 2 children has a height of 2. Therefore, the frequency of people who have 2 children is 2.

Step 2: Find the total number of people surveyed.

From the histogram, we sum the frequencies of all the bars:

• Frequency for 1 child = 3
• Frequency for 2 children = 2
• Frequency for 3 children = 4
• Frequency for 4 children = 5

So, the total number of people surveyed is: $3 + 2 + 4 + 5 = 14$

Step 3: Calculate the relative frequency.

The relative frequency is calculated by dividing the frequency of people with 2 children by the total number of people surveyed: $\text{Relative frequency} = \frac{\text{Frequency of 2 children}}{\text{Total frequency}} = \frac{2}{14} = \frac{1}{7} \approx 0.1429$

Thus, the relative frequency of people who have 2 children is approximately 0.1429, or 14.29%.

Would you like further details on how relative frequencies work or any other aspect of this question? Here are 5 related questions to explore:

1. What is the relative frequency for people who have 3 children?
2. How is a relative frequency different from an absolute frequency?
3. How would the relative frequency change if more people with 2 children were surveyed?
4. How can cumulative frequency be calculated from the given data?
5. What is the probability interpretation of relative frequency in statistics?

Tip: In a histogram, the relative frequency is the proportion of the total data set that each bar represents.