advantages and disadvantages of mean

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Question:

Answers:Let's start with mean. Advantages: Finds the most accurate average of the set of numbers. Disadvantages: Outliers can change the mean a lot... making it much lower/higher than it should be. Median: Advantages: Finds the middle number of a set of data, so outliers have little or no effect. Disadvantages: If the gap between some numbers is large, while it is small between other numbers in the data, this can cause the median to be a very inaccurate way to find the middle of a set of values. Mode: Advantages: Allows you to see what value happened the most in a set of data. This can help you to figure out things in a different way. It is also quick and easy. Disadvantages: Could be very far from the actual middle of the data. The least reliable way to find the middle or average of the data.

Question:

Answers:one advantage is that it is a quick and easy way to get a number that is representative of a set of numbers a disadvatage can exist if the set of numbers is not evenly distributed (eg. 1,2,3,4,5,9999 the mean would be close to 1700 but would that be representative). for this reason salaries often use median.

Question:I am doing preparation for my French speaking exam by answering questions and have become unstuck on the above. Please help!!

Answers:Means of Transport for Adventure Travel There are many different means of transport to get around. Nevertheless, most people take the plane to reach their destinations. And when they set out for longer journeys, they also take the airplane to move between destinations, even if they are not far apart. According to us, taking the airplane is not the most adventurous way of travelling. It will only bring you to big cities or the most popular places, skipping the interesting countryside. And it will not bring you in contact with the locals, who are not using airplanes to get around. And what about those of us who are afraid of flying? And what about the air travel s contribution to global warming? So, lets find out about some alternative means of transport for adventure travel. Do you travel with the locals? For us, adventure travel includes finding your way around by public transport. This is what is often meant by independent travel (or individual travel) as well. A drawback may be that it takes some more time to get around, but on the other hand it is a great way to meet local people, and that s also what travelling is about, isn t it? In general, two types of public transport systems can be identified: the systems that take you from destination to destination, and local systems that help you get around. Should you use the train or the bus? To travel from one destination to another, we prefer to travel by train. Trains are comfortable, without sudden movements, and mostly you can move around in them. More information can be found on our page about Train Travel. In some continents or countries, however, there are little or no rail tracks. To move between destinations there, you will have to take the bus. But buses have their advantages, too. For one, they are often cheaper than trains. So check our page about Bus Travel to know when and where you can take the bus. How do you get around? To get around within a city or region, you need to depend on local transport. However, in every continent, every country, and even in every city, the local public transport system can be different. When travelling to the big cities in for instance Europe, be prepared to learn the specific details of the local subway or bus system again for each city. These are the general guidelines for this: find a public transport map; find out the payment type and discount cards; and get going. In some continents and countries, however, you need to learn the general way of local transport. Read about a few of those on our Rickshaw page. What is meant by Overlanding? Apart from using public transport, there are other means of travelling overland. Bringing your own vehicle is also an option. In urban areas and developed country, this may have some of the disadvantages as air travel: you will only see your destination plus the highway, and you will not meet the locals. In more remote areas, however, you will indeed see much more, and may end up sleeping at the locals in distant villages in the countryside. In these remote regions, you will most likely need a 4x4 vehicle or motorbike, allowing you to go offroad. You can read more about this in this article about Offroad Adventure Travel, written for us by offroad specialist Ron Douglas. If you are adventurous, but not technical enough to go by your own 4x4, consider taking an overland truck. These are organized trips, but other than that, they offer all the excitement of adventure travel. Read more about this way of travelling on out page about Overland Trucks. And check out how to travel Africa Overland. Last, but certainly not least, we would like to mention travelling by bicycle. Agreed, it is slow, but if you have more time on your hands, it is the best way to experience the country and region you are travelling in. You can read more about it in this article about Bike Travel, written for us by experienced bicycle traveller Peter van der Lans. Advantages and Disadvantages The biggest advantage of NGVs is that they reduce environmentally harmful emissions. natural-gas vehicles can achieve up to a 93 percent reduction in carbon monoxide emissions, 33 percent reduction in emissions of various oxides of nitrogen and a 50 percent reduction in reactive hydrocarbons when compared to gasoline vehicles. NGVs also rate higher in particulate matter 10 (PM10) emissions. PM10 particles transport and deposit toxic materials through the air. NGVs that operate in diesel applications can reduce PM10 emissions by a factor of 10. Natural-gas vehicles also offer these benefits: Build vs. Buy NGVs can be built from scratch to include the design enhancements described above. A brand-new natural-gas vehicle costs $4,000 to $8,000 more than a comparable gasoline vehicle. It's also possible to modify conventional gasoline vehicles to run on natural gas. This, too, can be expensive, with the modifications typically costing $3,000 to $5,000. Veh

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Answers:Quartile divides the set into 4 equal number of pieces. The advantage is that each group has the exact same number of items as the others. The disadvantage is in when you are seeking to examine the data as a whole, such as what the mean or median is. One of the four groupings could be way extreme (high or low) compared to the other three. This would definately throw off the mean and perhaps cause the median to not be representative of the data. Geometric mean's advantage is that it can operate within a set of changing data, perhaps even exponentially changing data. Much more useful than quartile ... IF ... the data is changing at such a rapid pace. Within this set of data, I'm not sure if there is a disadvantage.