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
Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.
Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.
Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.
Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.
The average office desk has 400 times more bacteria on it than a toilet.
For a complete list of videos, visit our video library
