# ACET (Actuarial Common Entrance Test) Statistics: Questions 38 - 43 of 81

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## Question number: 38

» Continuous Random Variables » Coefficient of Skewness

### Question

For 50 students of a class the regression equation of marks in Statistics and Mathematics is , where X and Y respectively represent marks in Statistics and Mathematics is 44, then the mean marks in Statistics are

### Choices

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

a. | 72.5 | |

b. | 54.2 | |

c. | 62.4 | |

d. | 24.9 |

## Question number: 39

### Question

Which of the following is NOT a frequency diagram?

### Choices

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

a. | Ogive | |

b. | Pie Chart | |

c. | Histogram | |

d. | Polygon |

## Question number: 40

» Continuous Random Variables » Mean, Mode, Median

### Question

For a bivariate data, the mean value of , the mean value of , the regression coefficient of Y on X is and the correlation coefficient between X and Y is . Find the regression coefficient of X on Y.

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | Question does not provide sufficient data or is vague |

## Question number: 41

» Probabilities » Independence of Events

### Question

Two events A and B are mutually exclusive and . Find the probability that either A or B will occur.

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | Question does not provide sufficient data or is vague |

## Question number: 42

» Discrete Random Variables » Mean, Mode, Median

### Question

The Mean and Median values of a series are 16 cm and 20 cm respectively. What is the modal value of the series?

### Choices

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

a. | 18 | |

b. | 20 | |

c. | 28 | |

d. | 24 |

## Question number: 43

» Discrete Distributions » Poisson

### Question

Which probability distribution is suitable for calculating the number of air accidents in some unit of time?

### Choices

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

a. | Binomial | |

b. | Normal | |

c. | Geometric | |

d. | Poisson |