It is hard to get the perfect number, by the time you read these answers, a few hundred phones would have been sold.. It was around 800 million Android users and 300 million iOS users in 2013.. Apple reached 1 billion phones in November of 2014.. Evans estimates that Apple paid iOS app developers $10 billion in the last 12 months vs. the $5 billion Google paid Android developers.
It can also be used in socioeconomic research. Theoretical probability is also used in certain research and businesses. 1.Experimental probability measures the ratio of outcome vs. attempt while theoretical probability measures the favorable or wanted outcome vs. the possible outcome.
This is a probability based on testing, not an actual percentage of what all rats could do. ----- Or better yet, you could contrast empirical with classical. Classical probability states that on a coin toss, heads comes up 50% of the time with a balanced coin. Suppose with your coin, you get 47/100 heads. Your empirical probability for heads is 47%.