Statıstıcs II (ENG)
Ünite Sınavı Soruları
- 20 soru
- Soru metinleri açık; şıklar ve cevap anahtarı uygulamada
- 1
In which of the followings all pairwise values of the two continuous variables are plotted in two dimensions?
- 2Which of the following is not true?
- 3
In a simple linear regression analysis, the correlation coefficient is 0.40, what is the coefficient of determination?
- 4
In The Analysis of Variance Table in Multiple Linear Regression, what is the degrees of freedom if the source of variation is regression?
- 5
What might be the correlation coefficient according to that graph?
- 6
If there is a positive perfect correlation between two variables, what is the value of the correlation coefficient?
- 7
According to a simple linear regression model for a problem with two variables, the total variation in the model is partitioned as follows:
SSR=100
SSE=120
What is the value of the coefficient of determination for these values?
- 8
if there are k independent variables in multiple linear regression, how many dependent variable we could have?
- 9
What is A in the graph above?
- 10
In multiple linear regression if SSR=235 and SST=500, what is the coefficient of determination?
- 11
In The Analysis of Variance Table in Multiple Linear Regression, what is the degrees of freedom if the source of variation is error?
- 12
Which of the followings represents the population correlation for Pearson’s correlation coefficient?
- 13
If it is known that the correlation of two variables is -0.49, which of the following statements is true?
- 14
According to a correlation relationship between two variables, if the coefficient of determination is 0.50, which of the following represents the meaning of this value?
- 15
What is the coefficient of determination if the correlation is 0.4?
- 16
What is the interpretation of Pearson’s Correlation Coefficient values "-0.8 ≥ r ≥ 0.99"?
- 17
If SSR = 125 and SSE=248, then what is SST?
- 18
Which of the followings is widely used in order to show the degree of the relationship between two continuous variables?
- 19
In the significance test for Pearson's correlation coefficient, the following values are found: n=15, r=0.45. What is the observed statistic t for the sample information?
- 20
In general, the correlation analysis looks at the relationship between variables and examines the degree of the relationship if there is any. Which of following presents the reverse relationship between the values of the variables?