The image shows a table that seems to represent a frequency distribution with class intervals and their corresponding frequencies. It likely involves a summation of values for calculating certain statistical measures like mean, median, or standard deviation. The columns seem to be:

• Class intervals (e.g., 100-120, 120-140, etc.)
• Frequencies $f_i$
• Midpoints $x_i$ (these are likely the class midpoints, calculated as the average of the upper and lower boundaries of each class)
• $f_i x_i$ (the product of frequency and midpoint)

Could you confirm the context of the table? Are you trying to compute the mean, median, or some other statistical value? Let me know so I can help you further.

Would you like me to provide more details or help with calculations based on the data?

Here are some related questions for better understanding:

1. Do you need to calculate the mean for this frequency distribution?
2. Are you interested in finding the median or mode?
3. Is this for a grouped frequency distribution problem?
4. Do you want to calculate the standard deviation for this data?
5. Are you familiar with how midpoints are calculated in a frequency table?

Tip: In grouped data, the midpoint of a class interval is found by taking the average of the lower and upper limits of the class.