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Spurious Correlations
- in several rare situations when plotting the data for x and y we may have a group indicating either positive correlation or negative (-ve) correlation but when you analyze the data for x and y in general life there may be no convincing evidence that there is such a relationship. Therefore this shows that the relationship only exists in theory and thus it is referred to as spurious or non sense for illustration, when high pass rates of student show high relation along with increased accidents.
Example 1 Add 4x 4 + 3x 3 - x 2 + x + 6 and -7x 4 - 3x 3 + 8x 2 + 8x - 4 We write them one below the other as shown below.
The position of an object at any time t (in hours) is specified by, s (t ) = 2t 3 - 21t 2 + 60t -10 Find out when the object is moving to the right and whiles the object
The following table contains some information about the model used. Assume the probabilities given by the model are those of being a good writer. Variable
Describe Segments, Rays, Angles, and Triangles We now define some more basic geometric figures. 1. Segments Definition A segment is the set of two given points and all the
Q. What is the probability of choosing a red ball? Ans. A box contains a red, blue and white ball. Two are drawn with replacement. (This means that one ball is selected, i
Partial Derivatives Partial derivatives are used while we want to investigate the effect of one independent variable on dependent variable. For illustration, the revenues of a
Find the distance between the points (b + c, c + a) and (c + a, a + b) . Ans : Use distance formula
Solve for x: 4 log x = log (15 x 2 + 16) Solution: x 4 - 15 x 2 - 16 = 0 (x 2 + 1)(x 2 - 16) = 0 x = ± 4 But log x is
Write the next two terms √12, √27, √48, √75................... Ans: next two terms √108 , √147 AP is 2 √3 , 3 √3 , 4 √3 , 5 √3 , 6 √3 , 7 √3 ......
-10b2*-5b2=
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