Several years ago, 41% of parents with children in grades K-12 were satisfied with the quality of education the students receive. A recent poll found that 468 1,135 parents with children in grades K-12 were satisfied with the quality of education the students receive. Construct a 90% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. Click the icon to view the Confidence Interval Critical Value table. What are the null and alternative hypotheses? Ho: P = 0.41 versus H₁ p = 0.41 (Type integers or decimals. Do not round.) Find the 90% confidence interval. The lower bound is The upper bound is (Round to three decimal places as needed.) G

Several years ago, 45% of parents with children in grades K-12 were satisfied with the quality of education the students receive. A recent poll found that 495 of 1,125 parents with children in grades K-12 were satisfied with the quality of education the students receive. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. Click the icon to view the Confidence Interval Critical Value table. What are the null and alternative hypotheses? Ho: P # 3 versus H,: p (Type integers or decimals. Do not round.) %3D Find the 99% confidence interval. Confidence interval critical values The lower bound is 7 The upper bound is 7 (Round to three decimal places as needed.) Confidence Interval Critical Values Critical Value, Za/2 Level of Confidence What is the correct conclusion? 0.90 or 90% 1.645 0.95 or 95% 1.96 A. Since the interval does not contain the proportion stated in the 0.98 or 98% 2.33 hanged.…

Suppose the English department of a local university has a  total of 105 faculty members. Of this number, 24 (about 23%) are part-time instructors. Is it appropriate to find a confidence interval for the percentage of part-time instructors in the department? Find a 95% confidence interval  or explain why you should not find a confidence interval for the percentage of part-time instructors in the English department.

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 1,135 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,135 surveyed, 474 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. What are the null and alternative hypotheses? Ho: P versus H₁: p (Round to two decimal places as needed.) (…)

According to a poll, 81% of California adults (410 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California.What is a point estimate for the true population proportion?

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 1,175 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,175 surveyed, 473 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: p versus H1: p (Round to two decimal places as needed.)

Several years​ ago, 45​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,025 parents who have children in grades​ K-12 if they were satisfied with the quality of education the students receive. Of the 1,025 ​surveyed, 484 indicated that they were satisfied. Construct a 99​% confidence interval to assess whether this represents evidence that​ parents' attitudes toward the quality of education have changed.

In a study designed to determine whether there was a cluster of brain cancer cases at a Pratt & Whitney plant, record from 223,000 employees were studied and 723 employees with brain tumors were found. Treat those employees as a random sample and construct a 95% confidence interval estimate of the proportion of all adults who develop such tumors. write a brief statement interpreting that confidence interval.

Suppose NBC has asked the same question to a sample of 1296 adults nine months earlier, finding 47% with an optimistic outlook for the year ahead.  Develop a 95% confidence interval for the percentage of American adults who had an optimistic outlook for the economy nine months earlier.

Several years ago, 48% of parents with children in grades K-12 were satisfied with the quality of education the students receive. A recent poll found that 474 of 1,005 parents with children in grades K-12 were satisfied with the quality of education the students receive. Construct a 95% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. Click the icon to view the Confidence Interval Critical Value table. ..... What are the null and alternative hypotheses? Ho: p (Type integers or decimals. Do not round.) versus H1:p Find the 95% confidence interval. The lower bound is The upper bound is (Round to three decimal places as needed.) What is the correct conclusion? A. Since the interval does not contain the proportion stated in the null hypothesis, there is insufficient evidence that parents' attitudes toward the quality of education have changed. B. Since the interval does not contain the proportion stated in…