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Use Graphical Techniques Theory Questions

Use Graphical Techniques Theory Questions 1.       What is central tendency? 2.       State two (2) ways of finding central tendency. 3.       What is dispersion? 4.       State two (2) ways of finding dispersion. 5.       State the formula for calculating probability. 6.       State, using whole numbers, the minimum and maximum value for probability. 7.       If the probability of event A is 0.4 and the probability of event B is 0.2, calculate the probability of: a.        event A or event B happening. b.       event A and event B happening. c.        event A not happening( as a percentage). 8.       What happens to the standard deviation of a control graph if sigma 2 limits are used? 9.       Which values on a control graph would indicate that something may be wrong? 10.   In the equation of a line which states that y =m x + c , what does the m and c represent? 11.   In the line equation y =m x + c which two values represent the coordinates of a point
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AREA AND PERIMETER

Watch the video below to discover how to calculate the area and perimeter of some basic shapes. Now that you have watched the video test your knowledge by downloading and completing the interactive quiz below. PERIMETER AND AREA WORKSHEET
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Ratios: don't blow them out of proportion!!

Ratios are used as a means of comparing two or more items that share some correlation or connection. When you equate two or more ratios then you are now solving for proportion. Below is a link to Purplemath.com that explains ratios and proportions in an easy to understand way. Ratios - Purplemath.com
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Metric Conversion (Advanced)

View the post "Metric Conversion (Basic)" before reading this post in order to look at the basic concepts. In this lesson we look at how to convert non-linear measurements (i.e. square, cubic, etc). To convert these units follow the steps below e.g. Convert 28 m 2 to cm 2 Step 1: Subtract the respective levels metre = 4 and centimetre = 2 => 4 - 2 = 2 Step 2: Multiply your answer from step 1 by the power to which the unit is raised => 2 * 2 = 4 Step 3: Determine the multiple of ten (10) to be used Since the answer from step 2 is 4 then write 4 zeros after 1 to get 10000 Step 4: Determine whether to multiply or divide Since the answer from step 1 is positive then you multiply => 28 m 2 = 28 * 10000 cm 2 = 280000 cm 2 e.g. Convert 14 cm 2 to m 2 Step 1: Subtract the respective levels centimetre = 2 and metre = 4 => 2 - 4 = -2 Step 2: Multiply your answer from step 1 by the power to which the unit is raised => -2 * 2 = -4 Step 3: Determine the multiple of ten
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Metric Conversion ( Basic)

The metric system is widely used around the world. Therefore skilled technicians need to be able to use the metric system effectively. The metric system is a base ten system based on similar principles as our base ten counting system. The table on the left shows the various units and their respective "levels" in comparison to the other units. If you memorize the table then it becomes very easy to convert from one unit to the next. To convert from one unit to the next you need to determine the equivalent value of 1 unit of the original unit in the required unit. This can be done by applying the following steps. e.g. Convert 28 m to cm Step 1: Subtract the respective levels metre = 4 and centimetre = 2 => 4 - 2 = 2 Step 2: Determine the multiple of ten (10) to be used Since the answer from step 1 is 2 then write 2 zeros after 1 to get 100 Step 3: Determine whether to multiply or divide Since the answer from step 1 is positive then you multiply => 28 m = 28 * 100 cm = 2800
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