Bissoy.com
Doctors Medicines MCQs Q&A

A certain bivariate data byx and bxy have been calculated which is equal to 2.4 and 0.4, respectively. If the value of the x series are all multiplied by 5 and all values of y series are divided by 2, how would it affect the value of the two coefficients?

A certain bivariate data byx and bxy have been calculated which is equal to 2.4 and 0.4, respectively. If the value of the x series are all multiplied by 5 and all values of y series are divided by 2, how would it affect the value of the two coefficients? Correct Answer The coefficients are revised by byx = 0.24 and bxy = 4.0

The correct answer is The coefficients are revised by byx = 0.24 and bxy = 4.0

Key Points Bivariate Data:

  • Bivariate data deals with two variables that can change and are compared to find relationships.
  • If one variable is influencing another variable, then we will have bivariate data that has an independent and a dependent variable. This is because one variable depends on the other for change.
  • When a bivariate data in a particular equation is multiplied or divided by certain values, the value of the coefficients is affected in regression.
  • The coefficients will get revised.

Important Points

  •  A certain bivariate data byx and bxy have been calculated which is equal to 2.4 and 0.4, respectively.
  • If the value of the x series are all multiplied by 5 and all values of y series are divided by 2 the coefficients are revised by byx = 0.24 and bxy = 4.0 

Related Questions

In a two variable (X and Y) regression analysis, the regression coefficients are bxy = 0.6 and byx = 0.8. If y is dependent variable and x is independent variable, what is the percentage of variations in Y explained by X?
The values in one of the series in a bivariate data set are multiplied by a constant K, which of the following would change as a result of this? A. Karl Pearson's coefficient of correlation B. Standard deviation C. Covariance between the variables D. Rank correlation coefficient Choose the correct answer from the options given below:
rxy = 0.8 এবং byx = 1.6 হলে bxy কত?
bxy = 0.94 এবং byx = 1.01 হলে rxy = কত?
যদি byx = -0.8 এবং bxy = - 0.6 হয় তবে সংশ্লেষাঙ্কের মান কত হবে?
rxy = ০.৪ এবং byx = 1.6 হলে bxy কত?
যদি byx = - 1 এবং bxy = - 0.8 হয়, তবে সংশ্লেষাংকের মান কত?
Let x(t) be a continuous time periodic signal with fundamental period T = 1 seconds. Let {ak} be the complex Fourier series coefficients of x(t), where k is integer valued. Consider the following statements about x(3t):
1. The complex Fourier series coefficients of x(3t) are {ak} where k is integer valued.
2. The complex Fourier series coefficients of x(3f) are {3ak} where k is integer valued.
3. The fundamental angular frequency of x(3t) is 6π rad/s.
For the three statements above, which one of the following is correct?
Which of the following statements are true?
Statement I Big data refers to no precise quantity, but generally refers to data in the range of Petabytes and Exabyte, i.e. billions to trillions of records, all from various sources. Big data is generated much faster. than traditional data in much larger quantities.
Statement II Big data interests industries because they are able to learn more patterns and curious variances than smaller data sets, with the capability to provide valuable insights into consumer behaviour, weather systems, financial market activity, or other phenomena.
Statement III Various departments and product lines use various applications within most organisations and store data in separate datasets. These separate databases may contain similar data, but data from one data base to another is not always consistent. This is called data silo.
In a two dimensional flow, the component of the velocity along the X-axis and the Y-axis are u = ax2 + bxy and v = bxy + ay2. The condition for the flow field to be continuous is