Classic Quiz
Quiz Sciences

Quiz Regression1

Tomowsiak
Tomowsiak
5 played - 12 yrs ago

Regression1

 

Hard QUIZ 11 QUESTIONS
hard
 
Question 1 / 11
An experiment is performed 3 times. Each time a model is fit. This means we generate how many slopes? How many y-intercepts?

An experiment is performed 3 times. Each time a model is fit. This means we generate how many slopes? How many y-intercepts?

 
Question 2 / 11
Using the question above, is it accurate to say that the slope and the y-intercept are both random variables? That is, they vary as we repeat our experiment and fit the model again and again?

Using the question above, is it accurate to say that the slope and the y-intercept are both random variables? That is, they vary as we repeat our experiment and fit the model again and again?

 
Question 3 / 11
When we fit a model, the line gives what exactly?

When we fit a model, the line gives what exactly?

 
Question 4 / 11
The picture below shows what happens when we fit a model. Is this true or false?

The picture below shows what happens when we fit a model. Is this true or false?

 
Question 5 / 11
It looks as though the two variables are col-linear. Which means what exactly?

It looks as though the two variables are col-linear. Which means what exactly?

 
Question 6 / 11
The hypothesis stated below are correct for a modeling using a multiple regressors.

The hypothesis stated below are correct for a modeling using a multiple regressors.

 
Question 7 / 11
The table shown below is correct. That is, it shows the correct entries for multiple regression. n-p=n-(k+1)=n-k-1 k is number of predictors

The table shown below is correct. That is, it shows the correct entries for multiple regression. n-p=n-(k+1)=n-k-1 k is number of predictors

 
Question 8 / 11

Prediction intervals are wider then confidence intervals because they depend on the current estimate of the mean and the spread of the data. That is, we fit a model and reach in a grab a new datapoint

 
Question 9 / 11

If I conduct a regression analysis, and compute t stats. for each regression coefficient, then the square of these is what?

 
Question 10 / 11

It's possible to conduct partial regression tests on the contribution made by several predictors, given that several others are already in the model.

 
Question 11 / 11

I fit a model first with 1 regressor and then 2. R^2 adjusted increases. This means what?

Quiz Maths: Literal calculation
112 played - 5 mths ago
Quiz Mathematics
178 played - 1 yr ago
Quiz Maths in 10 questions
294 played - 1 yr ago
Quiz Square roots (maths)
239 played - 1 yr ago
Quiz Science in Bulk
421 played - 1 yr ago
Quiz 5 Kingdoms
16 499 played - 11 yrs ago
Quiz Science number 2
501 played - 14 yrs ago
Quiz Science
6 317 played - 14 yrs ago
Quiz Chemical elements
1 599 played - 17 yrs ago