Several years ago, 46% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,085 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,085 surveyed, 489 indicated that they were satisfied. Required:
a. Construct a 90% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed.
b. What are the null and alternative hypotheses?