Make a plot of the residuals to follow normal distribution

Assignment Help Basic Statistics

Reference no: EM13131158

a. Does there appear to be a linear relationship between the screen size and the price?
b. Which variable is the "dependent" variable?
c. Using statistical software determine the regression equation. Interpret the value of the slope in the regression equation.
d. Include the manufacturer in a multiple linear regression analysis using a "dummy" variable. Does it appear that some manufacturers can command a premium price? Hint: You will need to use a set of indicator variables.
e. Test each of the individual coefficients to see if they are significant.
f. Make a plot of the residuals and comment on whether they appear to follow a normal distribution.
g. Plot the residuals versus the fitted values. Do they seem to have the same amount of variation?

Reference no: EM13131158

Questions Cloud

Annual growth rate for gdp : Obtain annual data for a series of economic indicators from the ABS National accounts database. The economic indicators you are required to research are annual growth rate for GDP

What volume (l) of h2 can be prepared : What volume (L) of H2 at 745 torr and 20.oC can be prepared from 4.8 g of water? (Atomic weights: Fe = 55.85, O = 16.00, H = 1.008; 1 atm = 760 torr).

Word problem on man hours : It usually takes John 3 hours longer to do the monthly payroll than it takes Peter. They start working on it together at 9am and at 5pm, they have 85% of it done.

Price at which a stock can be sold : The price at which a stock can be sold depends upon a number of factors. Which statement below is not one of those factors?

Make a plot of the residuals to follow normal distribution : Make a plot of the residuals and comment on whether they appear to follow a normal distribution. Plot the residuals versus the fitted values. Do they seem to have the same amount of variation?

Application of fraction : Attendance at the Fireman's Ball has been declining. Each year, the number attending is 2/3 of the previous year's attendance and the cost of food is 3/4 that of the previous year.

How much heat must be transferred : Sulfur dioxide gas is oxidized in 50 percent excess air with 70 percent conversion to sulfur trioxide. The gases enter the reactor at 350 oC and leave at 450 oC.

What is the total overhead variance : Sweet Dreams manufactures candy. Its records revealed the following.

Describe why this series of reaction will produce : explain why this series of reaction will produce the 3,5-dibromotoluene and direct bromination of toluene produces the 2,4-dibromotoluene.

User Account

All Pages