A 95% confidence interval for the mean starting wage of welders in Georgia is found to be $19.60 to $23.12 per hour. A person claims that the mean starting wage of electricians in a specific region is $23. According to the confidence interval which of the following is the best response? We believe that $23 is almost for sure the correct population mean wage. We agree that 99% of all welders in Georgia probably have a starting wage of $23 per hour. We believe that $23 is not a plausible value for the mean wage. We can't dispute the claim that the mean wage is $23 but we do not believe the wage is exactly $23 either because there are a lot of other values in the interval too.

in a town in nj we take a random sample of 100 residents. It turns out that 25% of the adult residents have degrees higher than high school diploma. Find a 90% confidence interval.

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.

In a survey of 1798 US adults, 1365 said they had paid a bill online within the past year.  What is the LOWER endpoint of a 90% confidence interval for the population proportion?  What is the UPPER endpoint of a 90% confidence interval for the population proportion?

Suppose we wish to estimate the average number of hours per week that Americans watch TV. Use the following data from an SRS to find a 90% confidence interval: 30        64        49        40        21        58        9          43        39            43

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?

The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been concerned about lead levels in California wines. In a previous testing of wine specimens, lead levels ranging from 51 to 750 parts per billion were recorded. How many wine specimens should be tested if the BATF wishes to estimate the true mean lead level for California wines to within 10 parts per billion with 95% confidence? (Round your answer up to the nearest whole number.)

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).