Final answer:
Standard sectional lengths and comfortable seating sizes are determined based on the intervals provided in the table and personal preference, respectively.
Step-by-step explanation:
When it comes to standard sectional lengths, the data in the table provides a range of intervals in inches. These intervals can be used to determine the length of a sectional. For example, if a sectional falls within the 61.95-63.95 inches interval, its length would be between 61.95 inches and 63.95 inches.
As for comfortable seating sizes, this can vary depending on personal preference. However, a general guideline is to allow about 22-24 inches of seating width per person. For example, if a sectional has a seating width of 90 inches, it could comfortably accommodate 3-4 people.