Suppose that 44% of all americans approve of the job the president is doing. the most recent gallup poll consisted of a random sample of 1,400 american adults. a. what is the mean of the sampling distribution? b. what is the standard deviation of the sampling distribution (don't forget to justify the use of the formula)? c. describe the normal approximation for this sampling distribution (don't forget to justify this) you can simply write as n (mean, standard deviation) d. what is the probability that the gallup poll will come up with a proportion within three percentage points of the true 44%

Select the correct answer from each drop down menu a marketing company conducted a survey to assess the audience response to different aspects of a new advertisement. the company randomly chose 100 people to watch several advertisements of different lengths. the respondents were asked to note which ads they disliked. the table shows the survey results duration of ad number of viewers (seconds) who disliked ad 60 relationship between the duration of advertisements and the correlation coeficient for this data set is close to based on this information, we can conclude that there is a the audience dislong them reset next