simple regression line

The formula for the standard error of the estimate for the predictions made with a regression line is => I or II or III or IV..

In the previous chapters we studied the motion of a body moving with uniform speed in a straight line and also learnt to calculate the distance traveled by a body in any given time. We then observed that the bodies do not always move with uniform speed and an external unbalanced force is ..

Question 1 - Question: Answer: Steps of Construction: Step 1: Draw a rough sketch as shown in figure and mark the given measurements. Step 2: Draw a line XY and on it cut off BC = 3.5cm. Step 3: Step 4: Cut off a length BD=5.5cm on BY. Step 5: Join CD. Step 6: Draw the perpendicular bisec..

Forces Acting on the Bob of a Simple Pendulum - The bob of a simple pendulum is attached to a string which pulls the bob along its lengt..

. But the above table does not tell us whether the length and time period are directly proportional or not. By plotting a graph between L and T we can come to know whether L and T are directly proportional or not. We plot a graph by taking L along x axis and T along y axis, Graph between length and..

Which of the following statement(s) is/are true? I. A multiple regression equation with three independent variables x 1 , x 2 and x 3 and one dependent variable would have the form y′ = a + b 1 x 1 + b 2 x 2 + b 3 x 3 . II. A multiple regression equation with two independe..

A line XY and a line AB. The reflection of AB in XY. (i) From A, construct AM ^ XY and produce it. (ii) Obtain point A' (the reflection of A in XY) on the other side of XY, so that AM = A'M. (iii) Similarly, from B, construct BN ^ XY and produce it. (iv) Obtain poin..

In Physics, we study reflection and the image formed by a plane mirror. We specially notice two properties of the image: (i) The image is as much behind the mirror as the object is in front of it. (ii) The mirror is the perpendicular bisector of the line joining the image and the object...

A line XY and a point P outside it. The reflection of P in XY. (i) Construct a perpendicular from P to XY to meet XY at M. (ii) Produce PM to P' such that PM = P'M. Then, P' is the image of P in XY. If point P is on XY, then P itself is the imag..

Which of the following statement(s) is/are true? I. A residual is the difference between the actual value y and the mean of the y values y ‾ . II. A regression line is also called a least squares line. III. The coefficient of determination is the ratio of the e..