A poll is taken in which 367 out of 575 randomly selected voters indicated their preference for a certain candidate. (a) Find a 99% confidence interval for ?. ≤?≤

In a survey of 40 students in an introductory statistics class, a professor asks how many states in the United States each student has visited. Using the data from the professor's sample, a 99% confidence interval for the average number of states all students at the professor's school have visited is found to be (6.78, 12.18). Determine whether each of the following statements is valid or invalid. You may assume that the sample is representative of all students at the professor's school. (a)  We are 99% confident that the average number of states visited by the 40 students the professor surveyed is between 6.78 and 12.18.  Valid Invalid   (b)  Based on the 99% confidence interval, there is evidence that the average number of states visited by all students at the professor's school is different from 16.  Valid Invalid   (c)  We are 99% confident that the average number of states visited by all students at the professor's school is between 6.78 and 12.18.  Valid Invalid   (d)…

The results: A. Are, or B. Are not   significantly: A. High, or B. Low   so there: A. is, or B. is not

in a public opinion pool 1000 randomly selected persons were asked whether they would vote for candidate x in the next election and 357 replied "yes". the 90% confidence interval for the proportion of the population who would answer "YES" to the same question is?