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Q. Explain Correlation Coefficient?
Ans.
The strength of a linear correlation is determined by how precisely the y variable shifts as the x variable increases. The two pictures on the right show data with a higher correlation than those on the left.
Data is said to have a perfect correlation if all points lie exactly along a line.
The correlation coefficient, r, is a measure of the strength of the correlation. It is a number between 1 and +1. +1 indicates a perfect positive correlation and 1 indicated a perfect negative correlation. If r is positive, then there is a positive correlation between the two variables. If r is negative, there is a negative correlation between the variables.
Following is the trend equation for a time series data on a monthly basis for years 2007 to 2009: Y=2.375+0.895X. Find Y for 2nd quarter of 2010.
Q. How to stretch or shrink a graph? Ans. If you have the equation of a graph, you can stretch or shrink the graph, in either the x or the y direction, just by multiplying
The caffeine is expected to lower reaction time by an average of 30 msec. Scores on the simulator task for the regular population (without caffeine) form a normal distribution with
Importance
Q1.(i) The logistics department of a large firm employs three "estimators" whose job it is to decide the likely cost of delivering their products to their customers. This enables
theorems of probability ..
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Find the kinematic and dynamic viscosities of air at a temperature of 189°F and a pressure of 29 psia using Sutherland''s equation and the ideal gas law .
What is a Business-type activity Reported in the government-wide financial statements. Financed in whole or in part by fees charged to external parties for goods or services that
find the trend of the following table.
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