OA is B -The figure shows a normal distribution with mean m and standard deviation d, including approximate percents of the distribution in each of the six regions shown. For a population of 800,000 subway riders, the numbers of subway trips taken per rider last January are approximately normally distributed with a mean of 56 trips and a standard deviation of 13 trips. Approximately how many of the riders took between 30 and 43 trips last January?
In recent years, the United States has been known to export more of its services abroad than it has imported due to its experienced workforce and industrialization.
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What is Export?</h3>
These are the goods and services which are sold to another country in exchange of money and its equivalents and is regarded as one of the determinants of the value of the gross domestic product of countries.
High technological advancement which led to the increase in industries etc in the United States has led to an increase in goods production which are sufficient enough to cater for the people. This is the why the excess is usually sold to other countries. The more exports a country has, the more revenue it generates to cater for other departments.
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