Step-by-step explanation:
equate the equation to zero
x³-6x+11x-6=0
if we replace x with 1
it will result to zero
1³-6+11-6=0
using long Division
as shown in the picture
obtain
x²-5x+6
using factorisation
x²-5x+6
(x²-2x)-(3x+6)
x(x-2)-3(x-2)
x=2
x=3
x=1
If the covariance is 1225, variance of x is 1600,variance of y is 2500 then the correlation coefficient between x and y is 0.6125.
Given the covariance is 1225, variance of x is 1600,variance of y is 2500.
We have to find the correlation coefficient between x and y.
Covariance is basically a measure of the joint variability of two random variables.
Variance is a basically a measure of dispersion, meaning it is a measure of how far a set of numbers is spread out from their average value.
The correlation coefficient is basically the specific measure that quantifies the strength of the linear relationship between two variables in a correlation analysis.
We know that the formula of correlation coefficient is as under:
r=
r=1225/
r=1225/(40*50)
r=1225/2000
r=0.6125
Hence if the covariance is 1225, variance of x is 1600,variance of y is 2500 then the correlation coefficient between x and y is 0.6125.
Learn more about correlation coefficient at brainly.com/question/4219149
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Answer:
180
Step-by-step explanation:
formula density:
find volume ..
subtitute into formula density..