Question 1
A regression and correlation analysis resulted in the following information regarding an independent variable (x) and a dependent variable (y).
ΣX = 42
ΣY = 63
n = 7
Σ (Y - )(X - ) = 37
Σ (X - )2 = 84
Σ (Y - a. = 6.3571 + 0.4405xb.p-value < .05; reject Hoc.p-value < .05; reject Hod.0.582Question 2An automobile dealer wants to see if there is a relationship between monthly sales and the interest rate. A random sample of 4 months was taken. The results of the sample are presented below. The estimated least squares regression equation is = 75.061 - 6.254XYXMonthly SalesInterest Rate (In Percent)22 9.220 7.61010.445 5.3a.Obtain a measure of how well the estimated regression line fits the data.b.You want to test to see if there is a significant relationship between the interest rate and monthly sales at the 1% level of significance. State the null and alternative hypotheses.c.At 99% confidence, test the hypotheses.d.Construct a 99% confidence interval for the average monthly sales for all months with a 10% interest rate.e.Construct a 99% confidence interval for the monthly sales of one month with a 10% interest rate.
Question 2
An automobile dealer wants to see if there is a relationship between monthly sales and the interest rate. A random sample of 4 months was taken. The results of the sample are presented below. The estimated least squares regression equation is = 75.061 - 6.254X
Y
X
Monthly Sales
Interest Rate (In Percent)
22
9.2
20
7.6
10
10.4
45
5.3
Ask unlimited questions for free
People about to have surgery must tell their health care providers about all supplements they take.
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.
Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
For a complete list of videos, visit our video library
Author
Question: An automobile dealer wants to see if there is a relationship between monthly sales and the interest ... (Read 65 times)
