1. What is the mean, median, and 90^th percentile units per day produced amongst all factories in the sample? Create a histogram of the units per day based on "bin" widths 200 units wide starting with 1001-1200.
2. What is the mean, median, and 90^th percentile units per day produced amongst Sears factories in the sample? Create a histogram of the units per day based on "bin" widths 200 units wide starting with 1001-1200.
3. What is the mean, median, and 90^th percentile units per day produced amongst Wards factories in the sample? Create a histogram of the units per day based on "bin" widths 200 units wide starting with 1001-1200.
4. What is the probability that a randomly selected Sears factory produces < 2200 units per day? What is the probability that a randomly selected Wards factory produces < 2200 units per day? Based on your calculations, comment, if you can, on whether factory unit production is independent of factory type.

Factory Type	Units per Day
Sears	1008
Wards	1010
Sears	1033
Sears	1105
Wards	1150
Sears	1188
Wards	1245
Wards	1275
Sears	1293
Wards	1304
Sears	1344
Sears	1394
Sears	1428
Sears	1498
Wards	1536
Sears	1585
Sears	1650
Sears	1678
Wards	1704
Wards	1729
Wards	1788
Wards	1793
Wards	1820
Wards	1837
Sears	1858
Wards	1892
Wards	1904
Wards	1914
Sears	1915
Sears	1927
Wards	1975
Sears	1990
Sears	2011
Wards	2028
Wards	2080
Wards	2104
Sears	2288
Sears	2309
Sears	2402
Wards	2444
Wards	2475
Sears	2499