You will probably think to yourself that the coat shown costs about Â£300. Â£290 is considerably closer to Â£300 than it is to Â£200, so Â£300 is a reasonable approximation. In this case, 290 has been rounded up to 300. Similarly, 208 would be rounded down to 200 because it is closer to 200 than it is to 300. Both numbers have been rounded to the nearest hundred pounds.

When rounding to the nearest hundred, anything below fifty rounds down. So 248 rounds to 200. Anything o
Author(s): The Open University

The median is essentially the middle value of a batch when the values are placed in size order; it is found in the following way.

1. First, all the values in the batch are sorted into ascending order; that is, smallest first, then second smallest, and so on, ending with the largest.

2. Then, see if the batch size is odd or even. If there is an odd number of values in the batch, then the middle value in the list is the median. If there is an
Author(s): The Open University

Hopefully, thinking about how your solution to a mathematical problem might be marked, will help you to produce better solutions for yourself, as well as for somebody else. Now try the quizÂ  and see if there are any areas you need to work on.

Author(s): The Open University

1 You are planning to paint three rooms with total wall areas of 56, 38 and 40 square metres, using paint that comes in tins which claim to cover 15 square metres per tin. How many tins will you need for each room? And how many in total?

<
Author(s): The Open University

How do you write mathematics that can be read and easily understood by anyone else, such as a tutor or another student?

It takes practice, but the following guidelines may be helpful.

• Ensure that what you write consists of sentences. Too many people believe that mathematics is a language which is entirely made up of unfamiliar symbols. It is not. Many symbols act in part merely as abbreviations which, when read, can be translated back into spoke
Author(s): The Open University

Now that youâ€™ve learned how to do subtraction on paper, you might want to practice your new skills.

To practice subtracting whole numbers, including borrowing where necessary, go to the Practice SubtractingÂ  section of the Numbers website and click on Get sum. Then follow the instructions.

To practise subtracting decimals, go to the
Author(s): The Open University

If the number you are dividing by does not go exactly (with no remainder) into the digit you are dividing into, you need to do something called carrying.

Say you want to divide 952 by 7. The process is basically the same as in the previous section. First write it down on paper. Then, to do the calculation, you take each digit from the number being divided in turn, starting with the one on the far left, and see how many times the dividing number, 7 in this case, goes into it. The calcul
Author(s): The Open University

In much of your statistical work, you will begin with data set, often presented in the form of a table, and use the information in the table to produce diagrams and/or summary statistics that help in the interpretation of the data set. However, in practice, much interpretation of data sets can be done directly from an appropriate table of data, or by re-presenting the data in a rather different tabular form. Dealing with data in tables is the subject of this section and the next. By the time
Author(s): The Open University

## Example 1.2 Infants with SIRDS: boxplots

Boxplots are particularly useful for making quick comparisons. The following example relates to birth weights of infants exhibiting severe idiopathic respiratory distress syndrome (SIRDS), and the question â€˜Is it possible to relate the chances of eventua
Author(s): The Open University

All materials included in this unit are derived from content originated at the Open University.

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence

Author(s): The Open University

The danger of using three-dimensional effects is really brought home when two data sets are displayed on the same bar chart. Table 2 may be thought of as consisting of two data sets, one for male workers and one for female workers. On its own, each of these data sets could be portraye
Author(s): The Open University

Although there may be many occasions when you are given a formula to use, sometimes you may need to devise your own formulas, for example if you use a spreadsheet on a computer at home or at work. This section looks at the process of devising a formula in more detail.

Part of a spreadsheet that has been constructed to record monthly income and expenditure is shown below. It is similar to a balance sheet that you might draw up by hand and includes the monthly income and outgoings, the to
Author(s): The Open University

All written material contained within this unit originated at the Open University.

Author(s): The Open University

1 A new train operator boasts â€˜Train times reduced by 12%â€™. Decrease 90 minutes by 12%. Give your answer as minutes and seconds.

A 12% decrease would red
Author(s): The Open University

The second of the conjugateâ€“modulus properties enables us to find reciprocals of complex numbers and to divide one complex number by another, as shown in the next example. As for real numbers, we cannot find a reciprocal of zero, nor divide any complex number by zero.

## Example 2

Author(s): The Open University

There are two other surfaces that can be obtained by identifying both pairs of opposite edges of a rectangle. In one of these, shown in Figure 31, we first identify the edges AB and A'B', labelled a, in the direction shown by the arrowheads. This gives us a cylinder, as before. We then try to ident
Author(s): The Open University

In this episode NickChris and  Nate are joined by Bilal Aslam, Senior Program Manager on Windows Azure â€“ who shows us the Windows Azure Store and how developers can both consume services available within the store and how developers can build content to be sold within the store.  This week in the News:

Author(s): Nathan Totten, Nick Harris

Lesson 07 - One Minute Luxembourgish
In lesson 07 of One Minute Luxembourgish you will learn to say that it's nice to meet someone in Luxembourgish. Remember - even a few phrases of a language can help you make friends and enjoy travel more. Find out more about One Minute Languages at our website - http://www.oneminutelanguages.com. One Minute Luxembourgish is brought to you by the Radio Lingua Network and is Â©Copyright 2008.
Author(s): No creator set

Topic 7: Public Goods and Externalities Part 3 | Econ2450A: Public Economics
Raj Chetty Fall 2012
Author(s): No creator set

In this lesson, we begin the process of understanding how to utilize data in our app.  We begin by looking at this from the GroupedItemsPage.xaml's perspective, and how it utilizes the CollectionViewSource to bind to a View Model provided in the LayoutAwarePage.cs.  We talk about the DefaultViewModel object which implements IObservableMap<K, V> and what that really means.  Finally, we pick apart the SampleDataSource.cs and observe it's inheritance hierarchy and the purpos
Author(s): Dan Fernandez, Bob Tabor