Final answer:
The provided information does not include the exact percentage of women who buy their first home on their own but instead gives data related to women as primary household decision-makers. For specific data on female homeownership, one needs to analyze real estate trends and statistics.
Step-by-step explanation:
The percentage of women who buy their first home on their own is not provided explicitly in the marketing survey data samples given. However, the provided information does indicate the percentage of households where women are the primary decision-makers in purchasing decisions. A survey found that in 120 out of 200 households, women made the majority of the purchasing decisions. This suggests a population proportion, but it does not translate directly to home purchasing. To understand trends in female homeownership, one would need to look at specific real estate statistics and trends such as the ones hinted at during the housing boom between 1990 and 2006 where homeownership rates increased significantly.