The following data represent the number of housing starts predicted for the 2nd quarter (April through June) of 2014 for a random sample of 40 economists.

(a) Draw a histogram of the data. Comment on the shape of the distribution.
(b) Draw a boxplot of the data. Are there any outliers?
(c) Discuss the need for a large sample size in order to use Student's t-distribution to obtain a confidence interval for the population mean forecast of the number of housing starts in the second quarter of 2014.
(d) Construct a 95% confidence interval for the population mean forecast of the number of housing starts in the second quarter of 2014?