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What are the disadvantages of simple random sampling?

Depending upon the geographic spread of the population, simple random sampling is sometimes expensive and, on occasion, simply too massive. If collecting data from the sample takes too long because of the size, the data may become outdated before the study is completed. In addition, the membership of a population or sample varies if too much time passes. It is extremely difficult to conduct personal interviews as part of the simple random sampling method because the number of participants is often just too large. This means that the type of data collected is limited to what can be collected ef..

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What is 18 degrees Celsius in Fahrenheit?

Named after a German scientist, G.D. Fahrenheit, the Fahrenheit scale has two set points: the freezing and boiling points of pure water when at sea level, which are 32 and 212 degrees Fahrenheit, respectively. The International System of Units, or SI unit, for temperature is Kelvin. As of 2015 SI units are used by the majority of countries worldwide. According to the Kelvin scale, the boiling and freezing points of pure water at sea level are 373.15 and 273.15 Kelvin, respectively.

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What is a logarithm solver?

Symbolab has many mathematic calculators, including logarithmic equation calculator, integral calculator, limits calculator and tangent line calculator. Symbolab is a math and science search engine that also has the proficiency to solve math equations, and each solution contains step-by-step directives. Symbolab encompasses middle school and college-level math. There are many online logarithmic solvers that give tips on competently solving logarithms by hand.

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What is a word problem calculator?

Most calculators are unable to process a word problem and require symbolic math equations in order to arrive at an answer. Using a word problem calculator can also make it easier for children and adults to learn how to break down a word problem into solvable math.

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What percent is a "C" grade?

For example, at the University of Washington in Seattle, a "C" runs from 75 percent to 79 percent. An 80 is considered a "C" to "C+." At the other end of the scale, 73 or 74 percent is a "C-," while a 72 is a "C" to "D+." Other schools have slightly lower percentages for a "C." At the University of Northern Iowa in Cedar Falls, a "C" is 73 to 76 percent. A "C-" covers 70 to 72, while anything in the high 70s equals a "C+."

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What is the formula to find the area of a triangle?

Since a triangle has three sides, a triangle has three potential bases and heights, so consistent variable definition is crucial to obtain an accurate calculation. The base and height used in the formula need to be perpendicular to one another to correctly determine the area of the triangle.\nThe area of a right angled triangle is half the product of the two sides forming the right angle. If the measures of all three sides of the triangle are equal then it is called an equilateral triangle and its area is obtained by using the formula Area = √3/4 x side 2.\nWhen all three sides of a triangle..

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What is a combination square used for?

Combination squares include a blade with ruler marks and interchangeable heads. The most common head is referred to as the standard or square head and is used to check right angles and 45-degree angles. Combination squares are available in 6- and 12-inch sizes.\nThe tool is used in metalworking for multiple tasks involving the layout and setup of metal. For example, it is used in positioning large items in machine vices at the appropriate angle.

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What is the formula used to find a raw score?

The raw score allows students to find their letter grades on curved tests. For example, if a test has a score of 45 out of 60, this must be converted to have any significance. Finding the z-score, mean and standard deviation allows a student to determine his raw score and where on the A-to-F grading scale he ranks.

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What is a circle's eccentricity?

The eccentricities of certain shapes fall within defined ranges. For an ellipse, the eccentricity lies between zero and one. A parabola, which is typically more stretched out, has an eccentricity of one. The eccentricity of a hyperbola is greater than one. However, a straight line has an eccentricity of infinity. In a practical application, the eccentricity of the earth's orbit around the sun is 0.02, because the path is not quite circular.

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What is a 180-degree angle called?

Once an angle is larger than 180 degrees, it is categorized as a reflex angle. As a reflex angle turns one full rotation of 360 degrees, a circle is formed.\nAngles are created when two straight lines intersect. The place where the two lines meet is called the vertex, while the two lines are called the arms of the angle. Rotating one of the arms either increases or decreases the angle measurement depending upon the direction of rotation.

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