Question

Some statistical methods require that the residuals from a regression line have a normal distribution. Consider...

Some statistical methods require that the residuals from a regression line have a normal distribution. Consider the following residuals.

0.37 -0.70 0.10 -0.34 0.19 0.61 -0.26 -0.98
1.64 -0.18 -0.23 0.54 -0.54 -1.11 0.93 -0.03

(b) Find the regression line of mean score on time step-by-step. First calculate the mean and standard deviation of each variable and their correlation (use a calculator with these functions). Then find the equation of the least-squares line from these. (Round your answers to two decimal places.)
? =  +  x

Draw the line on your scatterplot. What percent of the year-to-year variation in scores is explained by the linear trend? (Round your answer to one decimal place.)
%

Homework Answers

Answer #1

Descriptive Statistics: x, y

Variable Mean StDev
x -0.126 0.543
y 0.127 0.872

Correlation: x, y

Pearson correlation of x and y = -0.102

Regression Analysis: y versus x

Model Summary

S R-sq R-sq(adj) R-sq(pred)
0.937266 1.04% 0.00% 0.00%

Coefficients

Term Coef SE Coef T-Value P-Value  
Constant 0.107 0.341 0.31 0.765
x -0.164 0.653 -0.25 0.811  

Regression Equation

y = 0.107 - 0.164 x

1.04 percent of the year-to-year variation in scores is explained by the linear trend .

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT