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
Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).
All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.
Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.
Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
For a complete list of videos, visit our video library