# Correlation and Regression (CA Foundation Maths, Statictics, Logic, and Reasoning): Questions 19 - 24 of 42

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## Question number: 19

» Correlation and Regression

### Question

The regression line of y on is derived by

### Choices

Choice (4) | Response | |
---|---|---|

a. | The minimization of horizontal distances in the scatter diagram | |

b. | The minimization of vertical distances in the scatter diagram | |

c. | None of the above | |

d. | All of the above |

## Question number: 20

» Correlation and Regression

### Question

If the relationship between two variables x and y in given by , then the Value of the correlation coefficient between x and y is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 0 | |

b. | 1 | |

c. | -1 | |

d. | negative |

## Question number: 21

» Correlation and Regression

### Question

If the coefficient of correlation between two variables is –0.9, then the coefficient of determination is

### Choices

Choice (4) | Response | |
---|---|---|

a. | 0.81 | |

b. | 0.1 | |

c. | 0.9 | |

d. | 0.19 |

## Question number: 22

» Correlation and Regression

### Question

When we are not concerned with the magnitude of the two variables under discussion, we consider

### Choices

Choice (4) | Response | |
---|---|---|

a. | Product moment correlation coefficient | |

b. | Rank correlation coefficient | |

c. | Coefficient of concurrent deviation | |

d. | All of the above |

## Question number: 23

» Correlation and Regression

### Question

What is spurious correlation?

### Choices

Choice (4) | Response | |
---|---|---|

a. | It is a negative correlation. | |

b. | It is a bad relation between two variables. | |

c. | It is very low correlation between two variables. | |

d. | It is the correlation between two variables having no causal relation. |

## Question number: 24

» Correlation and Regression

### Question

If the plotted points in a scatter diagram lie from upper left to lower right, then the Correlation is

### Choices

Choice (4) | Response | |
---|---|---|

a. | Zero | |

b. | Positive | |

c. | Negative | |

d. | None of the above |