QMB3200 Ch. 14 HW

Cape May Realty According to these regression results, the average weekly rental for a property that is 2,000 square feet is ________.

$1,473

Cars.com According to these regression results, the average selling price for a 7-year old car is ________.

$8,138

Using the file "Hikers", what is the p-value for this correlation coefficient? Round your answer to four decimal places.

.0126

Using the file "Missed Classes", complete a regression and determine the p-value of the model.

.034

Using the file "Missed Classes", what is the percentage of the final grade that is determined by the number of missed classes. Hint: this is the coefficient of determination.

.496

Using the file "Hikers", calculate the correlation coefficient for this sample. Round your answer to four decimal places.

0.7495

Some research The percentage of the variation in hours of sleep per night that is explained by the age of the adult is ________.

15.27

Cape May The percentage of the variation in weekly rental that is explained by the square footage of the property is ________.

22.45

Using the file "Hikers", determine the test statistic 't' for this correlation coefficient. Round your answer to three decimal places.

3.2021

Using the file "Missed Classes", complete a regression and determine the F-test statistic.

6.889

Using the file "Missed Classes", what is the predicted final grade of a student that missed three classes.

84

Cars.com Which one of the following statements is true using α = 0.05?

Because the p-value for the slope is 0.0351, we can reject the null hypothesis and conclude that there is a relationship between the age and selling price of a used car.

Some research Which one of the following statements is true using α = 0.10?

Because the p-value for the slope is 0.065, we can reject the null hypothesis and conclude that there is a relationship between the hours of sleep and the age of the adult.

Cape May Which one of the following statements is true using α = 0.05?

Because the p-value for the slope is 0.0870, we fail to reject the null hypothesis and conclude that there is no relationship between the weekly rental and square footage of beach property.

A correlation coefficient of -0.80 is an indication of a weak negative relationship between two variables.

False

Consider the relationship between the following variables: -Average high ambient temperature during the summer months would be considered the dependent variable.

False

Given a regression equation of = 15.6 - 3.8x, a one-unit increase in the independent variable would result in an average increase of 3.8 for the dependent variable.

False

The correlation coefficient is a measure of the slope of the scatter plot for the independent and dependent variables.

False

When the slope of a population regression line equals zero, we conclude that there is a linear relationship between the dependent and independent variables.

False

A relationship is linear if the scatter plot of the independent and dependent variables has a straight-line pattern.

True

Consider the relationship between the following variables: -Household income would be considered the independent variable.

True

The slope value for a regression equation represents the average change in the dependent variable for a one-unit increase in the independent variable.

True

The values of the correlation coefficient range between -1.0 and +1.0.

True

The formula for the equation describing a straight line is = b0 + b1x. The value for b1 in this equation represents the ______________.

slope of the straight line

The formula for the equation describing a straight line is = b0 + b1x. The value for b0 in this equation represents the _________.

y-intercept of the straight line