Several years ago, 42% 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 075 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1 comma 075 surveyed, 462 indicated that they were satisfied. Construct a 90% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed.

The 90% confidence interval for the proportion of parents who had children in grades K-12 were satisfied with the quality of education the students receive is (0.405, 0.455). 0.42 = 42% is part of the confidence interval, so we are 90% sure that there is no evidence that parents' attitudes toward the quality of education have changed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

In which

z is the zscore that has a pvalue of .

For this problem, we have that:

90% confidence level

So , z is the value of Z that has a pvalue of , so .

The lower limit of this interval is:

The upper limit of this interval is:

The 90% confidence interval for the proportion of parents who had children in grades K-12 were satisfied with the quality of education the students receive is (0.405, 0.455). 0.42 = 42% is part of the confidence interval, so we are 90% sure that there is no evidence that parents' attitudes toward the quality of education have changed.

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

i think 5 miles per hour

step-by-step explanation: