A spectrometer was used to measure the light absorbed by three standard solutions containing different concentrations of K2Cr207. The following data was obtained. Absorbance 0.162 0.320 0.486 [Cr] (ppm) 5.1 10.0 14.9 The equation of the straight line generated using the method of least squares is: y = 0.0331x - 0.0086. Use this information to find the standard deviation of the slope of the line expressed to the proper number of significant figures. O a.m = 0.0331 (±0.0045) b.m = 0.033 (20.004) Ocm= 0.0331 (±0.0001) %3D O d.m = 0.0331 (20.0101)
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
![A spectrometer was used to measure the light absorbed by three standard solutions containing different
concentrations of K2Cr207. The following data was obtained.
Absorbance
0.162
0.320
[C] (ppm)
5.1
10.0
14.9
0.486
The equation of the straight line generated using the method of least squares is: y = 0.0331x - 0.0086. Use this
information to find the standard deviation of the slope of the line expressed to the proper number of significant
figures.
O a. m = 0.0331 (±0.0045)
b. m = 0.033 (±0.004)
Oc. m = 0.0331 (±0.0001)
d. m = 0.0331 (+0.0101)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe2d05757-1697-4d59-b103-78ea3191ce71%2F3bf0c962-02e1-4052-b83d-969104d3f6d9%2Fg3trakm_processed.jpeg&w=3840&q=75)
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