REMEMBER WHEN DOING THE ZTEST OR DOING AN A TTEST YOU MUST C

REMEMBER: WHEN DOING THE Z-TEST OR DOING AN A T-TEST. YOU MUST CONSIDER THE MAIN-CRITERIA AND YOU MUST CONSIDER THE SIZE OF THE SAMPLE. WHEN THE SAMPLE SIZE TURNS OUT SMALL (<30) PERFORM A T-TEST, IF THE SAMPLE-SIZE IS LARGER (>= 30) PERFORM A Z-TEST.   SIMILAR WITH TWO-SAMPLE TESTS. (ONLY IF APPLYS)

FV:

      QUESTION: evaluate the following regression-analysis output.

Explain Ssignificance of r, p, F value;   PLEASE GIUVE THE regression equation.

Solution

r is correlation coefficient , +0.96 shows a strong positive correlation between X and Y

p-value of 5.7E-07 is extremely small, showing that it would be this much unlikely for the sample data to occur by chance if this coefficient was zero, i.e., the slope coefficient is significant.

F-value\'s significance of 5.7E07 is also extremely small as p-value, and suggests that the model is significant.