regression analysis: simplify complex data relationships coursera weekly challenges 1 answers

Test your knowledge: PACE in regression analysis

1. In regression modeling, which statement describes the PACE plan stage?

  • Examining data more closely to choose an appropriate model
  • Preparing formal results and visualizations for stakeholders
  • Building the regression model in a coding language
  • Understanding the data in the context of a problem

2. In which PACE stage does a data professional initially check the model assumptions?

  • Construct
  • Analyze
  • Plan
  • Execute

3. What three tasks typically occur during the PACE construct stage? Select all that apply.

  • Evaluate the model results
  • Re-check and confirm the model assumptions
  • Build the model
  • Present the visualizations to stakeholders

Test your knowledge: Linear regression

4. What technique estimates the linear relationship between a continuous dependent variable and one or more independent variables?

  • Causation
  • Intercept
  • Model validation
  • Linear regression

5. Which of the following statements accurately describe dependent and independent variables? Select all that apply.

  • The dependent variable is the variable the given model estimates.
  • Independent variables are also referred to as explanatory or predictor variables.
  • The independent variable tends to vary based on the values of dependent variables.
  • The dependent variable tends to vary based on the values of independent variables.

6. What term describes an inverse relationship between two variables?

  • Positive correlation
  • Slope
  • Negative correlation
  • Intercept

7. Fill in the blank: The goal of regression analysis is to use math to define the _____ between the sample X’s and Y’s in order to understand how the variables interact.

  • relationship
  • independence
  • value
  • model

Test your knowledge: Logistic regression

8. What is a nonlinear function that connects or links a dependent variable to the independent variables mathematically?

  • Relationship function
  • Link function
  • Loss function
  • Regression function

Shuffle Q/A 1

9. What type of regression models a categorical variable based on one or more independent variables?

  • Coefficient regression
  • Linear regression
  • Ordinary regression
  • Logistic regression

Weekly challenge 1

10. Fill in the blank: Regression models are groups of _____ techniques that use data to estimate the relationships between a single dependent variable and one or more independent variables.

  • coding
  • statistical
  • application
  • exploratory data
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