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What is a frequency polygon used for?

Making a frequency polygon starts much the same way as with histograms. Selecting a class interval should be followed by drawing an X-axis that represents score values in the data and then using a small tick mark to indicate the middle of each interval. Then, the Y-axis indicates the frequency with which each class appears. A point in the middle of each interval goes at the height marking its frequency. Connecting the points yields the frequency polygon.\nCumulative frequency polygons have a similar purpose, but the Y value at each point shows the number in a particular class as well as the nu..

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What are the multiples of 72?

One of the most commonly used multiples of 72 is, of course, 72 itself. The product of 72 x 1, 72, is the number of years that the U.S. Census restricts access to its records after collecting data. According to the Census Bureau, this rule was written into law in 1978 and is known as the 72-year Rule.\nAnother multiple of 72 is 144, the product of 72 x 2. This is the number of items in a gross, or a dozen dozens, and it is used extensively in shipping and logistics. It is also what is known as an "evil" number because 144, when rendered in binary code, has an even number of ones in its express..

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How many angles does a pentagon have?

The prefix penta- in pentagon is from the Greek and means "five," according to Dictionary.com. Regular pentagons have all equal sides and all equal angles, while the degrees of angles and lengths of sides vary in an irregular pentagon. The angles are each 108 degrees in a regular pentagon. The Pentagon in Washington, D.C. is a large five-sided construction that houses the Department of Defense for the United States government.

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What is a positive integer and a negative integer?

Positive and negative integers have many uses in real life. The negative integer -16 may be used to describe a loss of $16 or 16 pounds. The positive integer +5 might be used to refer to a gain of 5 pounds. These numbers are also used with temperatures. The positive integer +32 is another way to say it is 32 degrees above zero, while the negative integer -3 is used to say it is three degrees below zero.

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What comes in groups of nine?

There are nine forms of the Chinese dragon, which has nine main attributes and nine children. In ancient Egypt, nine bows symbolized the society’s traditional enemies. In Europe during the Middle Ages, the Nine Worthies referred to nine historical figures who were thought to personify the values of bravery. In the Japanese culture, the number nine symbolizes bad luck because the word for it and the word for "pain" are pronounced similarly.

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What are consecutive sides?

For example, a parallelogram has four sides and four angles. If it is assumed that each angle is named in a clockwise fashion with the letters A, B, C and D, the shape can be named ABCD, for the purpose of formulating and solving geometric equations. Each side can then be identified by its two endpoints: AB, BC, CD and DA, moving clockwise around the parallelogram. The sets of consecutive sides for this shape would be AB and BC, BC and CD, CD and DA and DA and AB.

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What are the factors of 35?

The four factors of 35 break down into two factor pairs. These factor pairs are one and 35 and five and seven. The five and seven factor pair is a unique factor pair in that both factors are prime numbers.\nAccording to MathIsFun.com, factors are integers that can be multiplied to get a number. Multiples are the end result of multiplying a number by an integer.

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How is math used in the real world?

Almost everyone has to deal with money in their daily lives, and money is largely about math. Before making a purchase, people need to know if they have enough money. More advanced math skills are important as well. Knowing how much money is needed to retire comfortably relies on math, and determining how much a mortgage will cost requires calculations as well.\nEffective science is dependant on math; statistical analyses inform scientists about how likely certain hypothesis are. Those working in the medical field must know how to interpret statistical data before recommend particular treatmen..

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What is the difference between a parabola and a hyperbola?

The parabola and the hyperbola also differ in terms of their properties as conic sections. Any conic section may be defined as a path or locus of points at a particular distance from a fixed line and a fixed point. These two types of conic sections can be differentiated by calculating the eccentricity, which is equal to the distance of the point on the curve to the fixed point divided by the perpendicular distance of that same point on the curve to the fixed line. A parabola has an eccentricity value of one, whereas a hyperbola has an eccentricity greater than one.\nThe graphs of these two cur..

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What is a z test?

Z-tests may also work for data sets that do not follow a normal distribution. In all Z-tests, the nuisance parameters must be known or estimated within a high level of certainty. The first step in running a Z-test is to state the null hypothesis and an alternate hypothesis. The Z-test statistic then can be calculated after choosing an alpha level and finding Z's value within the Z table.

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