Final answer:
The state of Washington's compliance with the new standards requiring at least 50% of highway exits to meet them cannot be determined without details on the confidence interval from prior analysis.
Step-by-step explanation:
Without specific information on the confidence interval mentioned in the first question, we cannot determine with certainty whether the state of Washington is in compliance with the new standards that require at least 50% of its highway exits to meet them.
To ascertain compliance, the state would need to evaluate the confidence interval derived from statistical analysis of the data on highway exits. If that confidence interval indicates that the true proportion of compliant exits is at least 50% with a high level of confidence, then the state can be considered to be in compliance.