Statistika PBA

If R2=0.45 in regression analysis, this means:

• The relationship between independent and dependent variables is very strong

• 45% of the variation in Y is explained by X

• The relationship between X and Y is negative

• The independent variable does not affect Y

• The data has a non-normal distribution

A teacher wants to know the effect of reading the Quran on students' tolerance attitudes. If b=5, then the interpretation is:

• Every 1 unit increase in reading the Quran, tolerance attitude increases by 0.5 units

• The relationship between reading the Quran and tolerance attitude is negative

• Reading the Quran does not affect tolerance attitude

• Every 1 unit increase in tolerance attitude, reading the Quran increases by 0.5 units

• There is no significant relationship between the two

In simple linear regression research, if b=3 and a=5 with X=4, then the value of Y is:

• 12

• 17

• 18

• 20

• 23

A PAI teacher wants to study the effect of group prayer intensity on students' social care levels. The independent variable is:

• Students' social care level

• Group prayer intensity

• Students' gender

• Students' happiness level

• Students' study time

The value b=−0.8 in a study about the relationship between social media playtime and religious study focus level. The interpretation is:

• The relationship between the two variables is not significant

• There is no effect of social media on religious study

• The more time spent on social media, the lower the focus on religious study

• Social media increases the focus on religious study

• The relationship between the two variables is positive

If R2=0.90, then:

• There is no relationship between X and Y

• 90% of the data does not fit the model

• The regression model is not valid

• The relationship between the variables is negative

• 90% of the variation in Y can be explained by X

A PAI teacher recorded the relationship between students' attendance at the school mosque and their moral values. If the regression results show a regression coefficient b=2, then the interpretation is:

• The initial moral value of students is 2

• For every 1 unit increase in attendance at the mosque, moral values increase by 2

• The relationship between the variables is negative

• Attendance at the mosque does not affect moral values

• 50% of moral values are explained by attendance at the mosque

If in regression analysis it is found that the residual value is large, then the regression model:

• Has a very strong relationship between X and Y

• Does not require improvement

• Has a normal data distribution

• Is less accurate in predicting the dependent value

• Is very suitable for further analysis

The correct simple linear regression model is:

• Y=b+aX

• Y=aX+bY

• Y=a+bX

• Y=X+b

• Y=X−b+a

If b=1.5 in the regression equation, this means:

• For every 1 unit increase in X, Y increases by 1.5

• The relationship between X and Y is negative

• The relationship between the variables is not significant

• The regression intercept is at 1.5

• The residual value is 1.5