Ünite Sınavı Soruları

Which of the following is not one of the assumptions in a linear regression model?

A multiple linear regreesion model is given above. Which one of the following statements is correct?

If the correlation between two variables is 0.75, what is the coefficient of determination in this problem?

The table given above indicates the correlation coefficients between A, B, C and D variables. According to those correlations, which one of the following statement is wrong? 

In a significance test for Pearson correlation coefficient, it is known that the null hypothesis “Population correlation is zero” is rejected. What might be the correlation coefficient? (Number of observation is 10)

How do you measure the degree of a relationship between two continuous variables?

In a simple linear regression model, the arithmetic mean of the independent variable is 60, arithmetic mean of the dependent variable is 140, and b=1.25. What is the value of  "a" for this simple linear regression model? 

In a correlation investigation, if we don't consider the two variables and we are dealing with two different population, which statistical term is come up?

In a simple linear regression model, if the equation is as follow,

y= 5 + (3.5)x

Which of the following can be accepted as a true expression?

Which of the following statements is true about "H0:ρ=0"?

The estimated simple linear regression model is y= 65 + 2.45 * x, what is the y value according to model if x=12?

Assume that the standard deviations of dependent and independent variables are 2.30 and 1.25 respectively. Besides their correlation coefficient is 0.60. What might be the possible regression model for those variables?

Which of the following interpretations is true if the negative value is -1 and the positive value is+1 in the interpretation of Pearson’s Correlation Coefficient?

Which of the followings represents random error in simple linear regression model?

If the correlation between two variables is 0, which one of the following is true?

If the correlation between two variable is defined as very weak positive correlation, which one of the following correlation value is possible?

In an investigation, the monthly electricity consumption (kw) of a family of four is estimated by the size of the house (in meter squares). It is going to be a big project, but the investigator creates a pilot study with 10 family homes in a small town. Here are the data values below;

Which of the following is the simple linear regression model for the case above?

Which of the following is not true about the multiple linear regression model?

If there are more than 1 independent variables in a regression analysis, what do we call the general model?