# ACET (Actuarial Common Entrance Test) Statistics: Questions 56 - 59 of 201

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## Question 56

### Question

MCQ▾Exclusive Vines import Argentinian wine into Australia. They՚ve begun advertising on Facebook to direct traffic to their website where customers can order wine online. The number of click- through sales from the ad is Poisson distributed with a mean of 12 click through sales per day. The probability of getting exactly 10 click through sales in the first day is given by-

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 57

### Question

MCQ▾Two variables are said to be perfectly negatively correlated if-

### Choices

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

a. | Coefficient of correlation between them is -1 | |

b. | Covariance between them is positive | |

c. | Correlation coefficient is positive | |

d. | Correlation coefficient is negative |

## Question 58

### Question

MCQ▾The positive square root of the mean of the squares of the deviations of observations from their mean is known as-

### Choices

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

a. | Mean Deviation | |

b. | Variance | |

c. | Range | |

d. | Standard Deviation |

## Question 59

### Question

MCQ▾A problem in statistics is given to three students A, B and C whose chances of solving it are , and respectively. What is the probability that the problem will be solved?

### Choices

Choice (4) | Response | |
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a. | ||

b. | ||

c. | ||

d. |