Linear regression

The diagram shows a scatter plot of a bivariate data. Which of the following is the correlation coefficient?

• r = -0.95

• r=0.75
  

• r=0.35
  

• r=–0.55
  

Tags

NGSS.MS-PS3-1

The diagram shows a scatter plot of a bivariate data. Which of the following is the correlation coefficient?

• r=0.5
  

• r=0.9
  

• r=1
  

• r=0
  

The diagram shows a scatter plot of a bivariate data. Which of the following is the correlation coefficient?

• r=0.7
  

• r=–0.7
  

• r=0.95
  

• r=–0.95
  

The diagram shows a scatter plot of a bivariate data. Which of the following is the correlation coefficient?

• r=0.95
  

• r=–1
  

• r=–0.95
  

• r=1
  

Tags

NGSS.MS-PS3-1

The diagram below a scatter plot of a bivariate data. Which of the following is the correlation coefficient?

• r=1
  

• r=–1
  

• r=0.95
  

• r=–0.95
  

Tags

NGSS.MS-PS3-1

The line of best fit of the following data has the equation y = 0.97x +1.02. Which of the following scatter plots shows the line drawn correctly?

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Tags

NGSS.MS-PS3-1

Which of the following scatter plots represents data with a Pearson correlation coefficient close to −1?

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Which of the following scatter plots represents data with a moderate positive linear correlation?

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Tags

NGSS.MS-PS3-1

Hay-Lin collects data on the height and weight of Olympic athletes. She determines the Pearson correlation coefficient to be 0.66. Which of the following statements is correct?

• The data show no correlation.

• The data show a strong, positive correlation.

• The data show a moderate, positive correlation.

• The data show a weak, positive correlation.

Tristan is studying the relationship between reaction time in seconds to the score achieved in a computer game. He intends to predict the score from measuring reaction time of certain players. The following data is available to use for his prediction.

What is the gradient (slope) for the line of best fit? Give your answer rounded to the nearest integer.

[Answer format: 0000]