# ACET (Actuarial Common Entrance Test) Statistics: Questions 50 - 55 of 81

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## Question number: 50

### Question

Which of the following is NOT true about scatter diagram?

### Choices

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

a. | It shows the degree of correlation | |

b. | If the dots are more scattered, it shows a low degree of correlation | |

c. | It indicates the coefficient of correlation | |

d. | It shows the direction of correlation |

## Question number: 51

» Probabilities » Bayes Theorem

### Question

If A and B are two events such that and . Find .

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | None of the above |

## Question number: 52

» Continuous Random Variables » Variance

### Question

If covariance between the variables X and Y is 10 and the variances of X and Y are 16 and 9 respectively then the coefficient of correlation is

### Choices

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

a. | 0.833 | |

b. | 0.721 | |

c. | 0.215 | |

d. | 0.146 |

## Question number: 53

» Discrete Random Variables » Probabilities

### Question

What is the value of ?

### Choices

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

a. | 100! | |

b. |
| |

c. | 9800 | |

d. | 9900 |

## Question number: 54

» Continuous Random Variables » Probabilities

### Question

A group consists of 3 girls and 4 boys. In how many ways can a team of 5 members be selected if the team has 2 girls and 3 boys?

### Choices

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

a. | 30 | |

b. | 12 | |

c. | 6 | |

d. | Both b. and c. are correct |

## Question number: 55

» Continuous Random Variables » Mean, Mode, Median

### Question

The value which occurs most frequently in the set of observations and around which the other items of the set are supposed to cluster densely is called

### Choices

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

a. | Mean | |

b. | Median | |

c. | Mode | |

d. | Geometric mean |