Question

Several years​ ago, 4444​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive. A recent poll asked 1 comma 1951,195 parents who have children in grades​ K-12 if they were satisfied with the quality of education the students receive. Of the 1 comma 1951,195 ​surveyed, 463463 indicated that they were satisfied. Construct a 9595​% confidence interval to assess whether this represents evidence that​ parents' attitudes toward the quality of education have changed.

Use technology to find the

9595​%

confidence interval.

The lower bound is

The upper bound is

Answer 1

n = Sample Size = 1195

P = Population Proportion = 0.44

So,

Q = 1- P =0.56

SE =

p = Sample Proportion = 463/1195 = 0.3874

= 0.05

From Table, critical values of Z = 1.96

Confidence interval:

The lower bound is:

The upper bound is

So,

answers are:

The lower bound is:

The upper bound is