The North American Free Trade Agreement (NAFTA) enacted in 1994 is a trilateral trade agreement signed by the United States, Canada and Mexico. This trade agreement has been controversial since its inception and Americans remain split on the issue. In a Gallup Poll conducted February 1-5, 2017, 448 out of 973 randomly selected Americans aged 18 or older stated that they believed that NAFTA was bad for the United States. a. Find the point estimate for the proportion of Americans who believe that NAFTA was bad for the United States. Round your answer to 4 decimal places. b. Find the margin of error for a 95% confidence interval. Round your answer to 4 decimal places. c. Construct the 95% confidence interval for the proportion of Americans who believe that NAFTA was bad for the United States. Enter your answer as an open interval of the form (a,b) and round to 3 decimal places. d. Can you conclude that more than half of Americans believe that NAFTA was bad for the United States? No, the entire confidence interval is below 0.50. No conclusions can be drawn since the confidence interval contains 0.50. O Yes, the entire confidence is above 0.50.

3. A light bulb manufacturer finds that 4% of the bulbs it makes are defective. The quality control officer predicts that 700 bulbs will be defective out of 15,500 bulbs made. Do you agree? Explain.

Among college students, the proportion p who say they’re interested in their congressional district’s election results has traditionally been 75%. After a series of debates on campuses, a political scientist claims that the proportion of college students who say they’re interested in their district’s election results is more than 75%. A poll is commissioned, and 210 out of a random sample of 260 college students say they’re interested in their district’s election results. Is there enough evidence to support the political scientist's claim at the 0.10 level of significance?Perform a one-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) A. State the null hypothesis Hoand the alternative hypothesis H1 B. Find the critical value. (Round to three or more decimal places.) C. Is there enough evidence to support the political scientist's claim that the proportion of college students who…

Suppose the U.S. president wants to estimate the proportion of the population that supports his current policy toward revisions in the health care system. The president wants the estimate to be within 0.02 of the true proportion. Assume a 90% level of confidence. The president’s political advisors found a similar survey from two years ago that reported that 61% of people supported health care revisions. a. How large of a sample is required? b. How large of a sample would be necessary if no estimate were available for the proportion supporting current policy?

4. Consider the following scatterplot and line of best fit: A. Use the following diagram to explain what is meant by line of best fit. B. Does the point in the box have a positive or a negative residual? Explain. C. Is the point in the box an outlier or an influential point? Explain.

As chairperson of the Rogers County Task Force on Aging, you wish to estimate the proportion of senior citizens in the region who would use a mobile medical check-up program if such a service was implemented. A random sample of 44 senior citizens was polled and it was found that 22 would use such a service. a. Let p represent the proportion of all senior citizens in the region who would utilize the mobile medical check-up program. Find a point estimate for p. (Round result to 3 decimal places.) b. Find a 95% confidence interval for p. (Round results to 3 decimal places.) ? ♥ < c. The Rogers County Director tasks you with doing a larger study, to develop a more precise estimate. The director would like an estimate for the proportion of retired people who would use the mobile medical check-up program that is within 5% of the population percentage, with 95% confidence. Using the original study (described above) as a preliminary estimate for the population proportion p, what is the minimum…

A. The median would be greater than the mean B. The mean would be greater than the median C. The mean and the median would be equal

according to the national household  survey on drug use and health, when asked in 2017, 31.0% of those aged 18 to 25 years said they had used cigarettes in the past year, 7.7% said they had used smokeless tobacco

3. Amarket research firm needs to collect data on viewer preferences for local news programming in Rochester. Which method of data collection is most appropriate? a. Survey b. Observational Study C. Census d. Controlled Experiment

The table shows the home ownership rate in each of the 50 states and Washington, DC. in 2017. 69.5 71.1 69.8 64.0 40.9 70.8 66.5 64.4 68.2 64.2 64.0 68.6 55.2 59.6 65.4 65.5 69.6 70.9 66.7 64.8 67.4 Source: U.S. Census Bureau. 62.2 56.3 67.9 66.2 74.1 74.5 70.7 62.7 71.4 66.1 63.4 69.7 72.0 66.5 70.2 70.8 71.3 50.5 63.1 65.8 65.6 64.3 69.5 64.9 68.3 62.4 69.2 74.8 With a lower class limit of the first class of 45 and a class width of 5: a) Construct a frequency distribution. b) Construct a relative frequency distribution. c) Construct a frequency histogram of the data. (Using Excel) d) Describe the shape of the distribution. 66.8 70.2