- Option : B
- Explanation : Z = (X - μ)/σ = (375 – 500)/100 = 1.25 The area according to the table is 0.3944. The total area will be = 0.5 + 0.3944 = 0.8944 or 0.8944 x 100 = 89.44%

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- Option : B
- Explanation :

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- A
The whole subject of correlation refers to that inter-relation between separate characters by which they tend, to some degree at least, to move together.

- B
That between two series or groups of data there exist some causational connections.

- C
Whenever some definite connections exist between the two or more groups, classes, or series to data, there is said to be a correlation.

- D
All of the above.

- Option : D
- Explanation :

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List-I (Items) | List-II (Application) |

(A) Probability | 1. Event |

(B) z = (x — μ)/σ | 2. Distribution |

(C) t-test | 3. Hypothesis test |

4. Normal distribution |

A | B | C | D | |

I | 1 | 2 | 3 | 4 |

II | 3 | 1 | 4 | 2 |

III | 4 | 1 | 3 | 2 |

IV | 1 | 4 | 3 | 2 |

- Option : A
- Explanation :

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