b. What conclusions can you reach concerning the categories? The conclusion is that category "B" has had the highest percentage of occurrences. Problem # 2.6 The following table represents world oil production in millions of barrels a day in 2013: Region Oil Production (millions of barrels a day) Iran 2.69 Saudi Arabia 9.58 Other OPEC countries 17.93 Non-OPEC countries 51.99 a. Compute the percentage of values in each category. b. What conclusions can you reach concerning the production of oil in 2013