# Statistical Inference and Hypothesis Testing-Confidence Interval Estimation (ISS (Statistical Services) Statistics Paper II (New 2016 MCQ Pattern)): Questions 1 - 6 of 73

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## Question number: 1

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

### Question

It is given that , and . Then the 95 % Confidence Interval for the population mean

### Choices

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

a. | 18 ± 222.45 | |

b. | 1725.61 ± 110.69 | |

c. | 1725.61 ± 222.45 | |

d. | 1725.61 ± 897.36 |

## Question number: 2

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

### Question

The diameter of cylindrical rods is assumed to be normally distributed with a standard deviation of 0.91 cm. A sample of 25 rods has a mean diameter of 4.5 cm. 95 % confidence limits for population mean are:

### Choices

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

a. |
| |

b. |
| |

c. | 1.9±0.098 | |

d. | All of the above |

## Question number: 3

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

### Question

As the level of confidence level decreases, the size of the corresponding interval will

### Choices

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

a. | Decrease | |

b. | Remains the same | |

c. | Increase | |

d. | All of the above |

## Question number: 4

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

### Question

It is given that , , . then 90 % Confidence Interval for is

### Choices

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

a. |
| |

b. |
| |

c. |
| |

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

## Question number: 5

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

### Question

is the Confidence intervals for when …… and is the Confidence intervals for when …. .

### Choices

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

a. | and | |

b. | and | |

c. | and | |

d. | All of the above |

## Question number: 6

» Statistical Inference and Hypothesis Testing » Confidence Interval Estimation

### Question

A school wants to study the number of days the students will be absent from school per year. It surveys attendance of 10 children and the number of days the children is absent from schools are

12 | 13 |

9 | 11 |

7 | 8 |

4 | 9 |

5 | 8 |

Standard deviation . Then 95 % Confidence interval on population mean is

### Choices

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

a. | 8.6±2.05 | |

b. |
| |

c. | 6.55≤μ≤10.65 | |

d. | All a. , b. and c. are correct |