Question

1. The annual precipitation measurements (Pi in cm) for M city, over a 20year period are shown in the following table. Determine the mean, standard deviation, and skew coefficient for this series.

Year	Pi(cm)	Year	Pi(cm)
1999	44.2	2010	39.2
2000	47.6	2011	38.3
2001	38.5	2012	46.1
2003	35.8	2013	33.1
2004	40.2	2014	35.0
2005	41.2	2015	39.3
2006	39.8	2016	42.0
2007	39.7	2017	41.7
2008	40.5	2019	37.7
2009	42.5	2019	36.6

2. Determine the mean, standard deviation, and skew coefficient for the log values of annual rainfall for M City, given in Problem 1 Also determine the mean precipitation (in cm) of the log-transformed data.

Answer 1