Question

Question 4 1.5 pts Which of the following statement is true based on the following regression equation? IQ = 4.0 + Reading Label * 5.6 A unit point change in IQ will result in 5.6-point increase in reading label. O A unit point change in IQ will result in 9.6-point increase in reading label. A unit point change in reading label will increase IQ by 5.6 point Reading label is not a good predictor of IQ. Question 5 1.5 pts Which of the following is true about multi-collinearity? The regression coefficients become clearer and are easier to interpret. The effect of an independent variable on the dependent variable becomes difficult to isolate. It is measured using a measure called variance inflation factor (VIF). The P-value reduces significantly, leading to rejection of the null hypothesis. Question 6 1.5 pts What would be the null hypothesis for testing a linear regression model with profit as the dependent variable and sales as the independent variable? There is a positive relationship between profit and sales. There is no linear relationship between profit and sales. There is a negative relationship between profit and sales. There is a linear relationship between profit and sales that can be either positive or negative.

Answer 1

Soluiton-4:

slope=5.6

changeiny /change in x=5.6

for unit hour increase in reading ,IQ increases by 5.6

ANSWER:

a unit point change in reading label will increase IQ by 5.6 point

Solution-5:

Muliticollinearity is rraltionship between independent variables

mesuared by VIF

VIF > 10 means multicolinear

ANSWER

Measured using a measure called VIF

Solution-6:

Ho there is no linear relationship between profit and sales

Ho:

B=0

Ha:there is a linear relationship between profit and sales

Ha:

30

ANSWER:

there is no linear relationship between profit and sales