Final answer:
A specific Field Poll concerning Governor Brown's water-saving policies was not provided, but Field Polls generally measure public opinion and have shown varied results in different contexts, such as approval ratings for laws and the Bradley effect in elections.
Step-by-step explanation:
A recent Field Poll survey referenced does not directly provide details about Governor Brown's water-saving policies. However, generally, Field Polls are known to measure public opinion on a variety of topics, including political measures and leaders' popularity. The provided example indicates that 61 percent of California registered voters approved a law in February 2013, with a higher approval rate among younger voters aged 18 to 39 at 78 percent. When constructing confidence intervals, such as the one regarding California adults' beliefs about top issues like education, it's important to consider the specified confidence level and sample size to gauge the public's opinion. Field Polls can sometimes illustrate phenomena like the Bradley effect or variations in responses depending on poll administration methodologies, which can affect the accuracy of predicting election outcomes or public support for policies.