Final answer:
A new or updated Family Care Plan is required within 90 days after the birth of a child. When surveying the length of maternity stays, X represents the population mean and X_bar represents the sample mean of the survey.
Step-by-step explanation:
A new or updated Family Care Plan is typically required within a maximum number of days after the birth of a child. The correct answer to the question 'A new or updated Family Care Plan is required within what max number of days after the birth of a child?' is C) 90 days.
Turning to the statistical part of the question, when dealing with maternity stay lengths and analyzing a random survey of 80 women, the following terms are used:
- a. In words, X represents the average length of stay in a U.S. hospital for maternity.
- b. The variable X_bar (read as "X bar") represents the sample mean or the average length of stay for the 80 women surveyed.
The average stay is reported to be 2.4 days with a standard deviation of 0.9 days. These statistics help in understanding the distribution and variability of maternity stays.