A researcher surveys 616 randomly selected Americans and asks them: "Do you believe that Climate change is a more serious threat to the world than international terrorism?"  Then 587 people answered "Yes" to this question.    Construct a 95% confidence interval to estimate the proportion of all Americans who feel that Climate change is a more serious threat to the world than international terrorism. Give the lower bound (the left hand side of the confidence interval) only (2 dp). Give the upper bound (the right hand side of the confidence interval) only (2 dp). Based on your confidence interval, would you believe that the true proportion could be 70%?

CNN is conducting a poll, and wants to produce a 90% confidence interval for the proportion of all New York residents who favor legalizing recreational marijuana. Of the 602 randomly selected New Yorkers surveyed, 394 were in favor of the initiative. a.   With 90% confidence, the proportion of New York residents who favor legalizing recreational marijuana is between  BLANK and BLANK.  b.   Suppose that we survey 602 randomly selected Americans many times, and calculate a confidence interval for each group. About Blank . percent of these confidence intervals will contain the true population proportion of New Yorkers who favor legalizing recreational marijuana, and about BLANK   percent will not contain the true population proportion.

A random survey of 150 CBC students found that 35 of them intended to transfer to WSU Tri-Cities upon completing their AA degree. Construct a 95% confidence interval for the proportion of CBC students intending to transfer to WSU Tri-Cities. Give your answer as a complete sentence in the context of the problem.

Please answer each

A survey of 240 teachers found that two-thirds of those surveyed do not live in Sydney. Can you conclude statistically that the population proportion who do not live in Sydney is less than ​0.75? Use a​ 95% confidence interval. What is the confidence interval and is 0.75 within the interval?

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?

If a Random Sample of 450 adults includes 155 who identify as happy, compute an 80% confidence interval for the true proportion of adults who are happy.

If n=430 and (p-hat) = 0.67, construct a 90% confidence interval. Give your answers to three decimals

In a recent survey of 1264 US adults, 26.6% said they had seen a ghost.  What is the LOWER endpoint of a 98% confidence interval for the population proportion? What is the UPPER endpoint of a 98% confidence interval for the population proportion?  Answers should be decimals (not percentages).

A poll showed that 40 out of 200 randomly chosen graduates of California medical schools last year intended to specialize in family practice. What is the width of a 95 percent confidence interval for the proportion that plan to specialize in family practice?