Practice Correlation And Regression (1.1.5) - Data Analysis and Interpretation

Practice: Correlation and Regression

Lesson 1.1.5Data Analysis and Interpretation

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8 questions

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Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
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6 sample questions

Question 1.
What is correlation?
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Think about how two things can go up or down together.
Question 2.
What range does the correlation coefficient fall into?
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What are the extremes of these values?
3Question 3.
What does a correlation coefficient of -0.5 indicate?
- A perfect positive correlation
- A moderate negative correlation
- No correlation
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Remember what the sign of the correlation coefficient indicates.
4Question 4.
True or False: A regression model can only predict outcomes for the data used to create it.
- True
- False
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Consider the limitations of models.
Question 5.
Using a dataset of ice cream sales and temperature records over a summer, derive a regression equation to predict ice cream sales based on temperature. Test your model's predictions with new temperature data.
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Use software or a graphing calculator for regression analysis.
Question 6.
You are analyzing two variables: the amount of regular exercise and cholesterol levels in a sample. Find the correlation and discuss what this might imply about their relationship.
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Consider health advice and statistics on exercise effects on health.

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