Life rating in Greece. Greece has faced a severe economic crisis since the end of 2009. A Gallup poll surveyed 1,000 randomly sampled Greeks in 2011 and found that 25% of them said they would rate their lives poorly enough to be considered "su↵ering".42
(a) Describe the population parameter of interest. What is the value of the point estimate of this parameter?
(b) Check if the conditions required for constructing a confidence interval based on these data are met. (c) Construct a 95% confidence interval for the proportion of Greeks who are "suffering".
(d) Without doing any calculations, describe what would happen to the confidence interval if we decided to use a higher confidence level.
(e) Without doing any calculations, describe what would happen to the confidence interval if we used a larger sample.