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What is a standardized regression coefficient?

Standardized regression coefficients are also referred to as beta weights. A beta weight refers to the number of standard deviations an outcome variable will increase due to one standard deviation increase of a predictor variable. Critics of standardized regression coefficients argue that removing the unit of measurement from a variable can create bias due to sampling error.

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What quadrilateral has perpendicular diagonals?

In geometry, the term "diagonal" refers to a segment connecting two vertices that does not form a polygon's side. A quadrilateral is said to contain perpendicular diagonals if four 90-degree angles are formed at the intersection of these diagonal lines. Diagonals that divide each other into two equal halves are called "perpendicular bisecting diagonals" or "perpendicular bisectors." Some quadrilaterals that do not contain perpendicular diagonals are rectangles, parallelograms and trapezoids.

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What is the formula for finding the volume of a cylinder?

Since the base of the cylinder is circular, the formula used to find its area is pi times the radius squared.The cylinder's volume is the formula of volume = B X h = pi x r^2 x h, where pi is approximated as 3.142 , height is the height and r is the radius.The unit of measurement for volume is given in cubic units.

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What is a line plot?

A line plot is a way to visually represent numerical data, including intervals-level data. It shows the occurrence of a value within a data set and is a part of descriptive statistics. A line plot serves the same purpose as a frequency table, which lists the number of times a value appears in a data set. Line plots organize data from a wide range of values.

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How many gallons of water are in a 27-foot-round and 52-inch-high swimming pool?

To find the radius, divide the circumference by 2 pi. In this case, the radius of the pool is approximately 4.3 feet. Take the square of 4.3 feet and multiply by pi. This yields an area of 58.1 square feet. Converting 52 inches to feet gives a pool height of approximately 4.3 feet. Multiply 58.1 x 4.3 to get a volume of approximately 250 cubic feet. Since there are 7.48 gallons per cubic foot, multiply 250 x 7.48 to get 1,870 gallons.

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How do I subtract a percentage from a price?

To subtract 25 percent from a price of $20, first convert 25 percent into a decimal. The decimal form of 25 percent is .25, which represents 25 out of a total of 100. Next, multiply the decimal by the original price. Twenty multiplied by .25 equals 5. Thus, 25 percent of the $20 price is $5. Subtracting 25 percent of the price is the same as subtracting $5 from the price. In this example, an item that costs $20 with a 25 percent discount is sold for $15.

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What is a "multiple" in math terms?

All multiples of 10 end in a zero because 10 multiplied by any number has a zero at the end. All multiples of five end in five or zero, and all multiples of two end in an even number. Every number is a multiple of one, and the least common multiple of two numbers is the smallest number evenly divisible by both of the numbers.

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What is the law of sines and cosines?

Draw a triangle. Label the angles A, B and C and the opposite sides a, b and c. The law of sines says that the sines of the angles are proportional to the lengths of the opposite sides. That means sin A/a = sinB/b = sinC/c.\nThe law of cosines says that for any triangle, the square of the length of any side equals the sum of the squares of the other two sides minus 2 times the product of those two sides times the cosine of the included angle. If seeking the length of side a, for example, use the formula a^2 = b^2 + c^2 - (2bc cosA), and then take the square root of both sides of the equation.

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What are some basic algebra formulas?

Usually, to arrive at the answer for a quadratic equation, mathematicians factor the quadratic, then equate each factor to zero, and solve for x. However, not all equations are factorable. Hence, the quadratic formula is used for these cases. The quadratic formula yields all the answers, including both real and imaginary numbers.\nWhen using the quadratic equation, first make sure that the equation is set to be equal to zero before computing. Otherwise, the formula will not work. Because of the +- sign between the two terms in the numerator, expect to have two different real or imaginary numbe..

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What prefix is used for the number "9"?

Another prefix used for the number nine is "novem-," as in the month "November," which used to be the ninth month in the ancient Roman calendar. Another prefix is "ennea-," which is derived from Greek and used in the word "enneahedron," which is another word for a "nonahedron," a solid with nine faces. Another prefix for nine from the Greek language is "enneakis-."

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