The image contains frequency tables and some statistical problems written in Indonesian. It appears to require you to calculate statistical measures such as the median, mode, mean, and quartiles based on grouped data.

Let's break down the tasks step by step from what I can see:

Table 1 (Grouped Data)

Data Columns:

• The first column likely represents class intervals (e.g., 50-59, 60-69, etc.).
• The second column appears to be the frequency $f$ for each class.

Tasks:

• (a) Median: You are asked to find the median of the grouped data.
• (b) Mode: Find the mode of the data.
• (c) Mean: Use the mid-point method (mean = $\frac{\sum f \cdot x}{\sum f}$, where $x$ is the midpoint of each class).
• (d) Lower quartile (Q1): Find the lower quartile (25th percentile).
• (e) Upper quartile (Q3): Find the upper quartile (75th percentile).

Table 2 (Different Data Set)

Data Columns:

• The first column represents a different set of class intervals (e.g., 29-38, 39-48, etc.).
• The second column represents frequencies $f$ for these intervals.

Tasks:

• (a) P-value: You are asked to determine the value of $P$.
• (b) Ratios: There's a request to calculate a ratio using certain data.

If you need help solving specific calculations, let me know which part you'd like to start with! Would you like to focus on the median, mean, or other calculations?

Questions to Expand Knowledge:

1. How do you calculate the median from grouped data?
2. What is the formula for the mean using midpoints in frequency distributions?
3. How is the mode determined in a grouped frequency table?
4. What steps are involved in finding quartiles in a grouped dataset?
5. How does changing the class intervals impact measures like mean and median?

Tip: Always ensure the class intervals are continuous when calculating measures like median and quartiles to avoid errors.