# Statistical Investigator SSC CGL TIER 2 Paper 3 : Part - 1

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# Statistical Investigator SSC CGL TIER 2 Paper 3 : Part - 1

**Statistical Investigator** SSC CGL TIER 2 Paper 3 : Part - 1

**Q1**. **The science of collecting, organizing, presenting, analyzing and interpreting data to assist in making more effective decisions is called:**

(a) Statistic

(b) Parameter

(c) Population

(d) Statistics

Option: D.

Explanation: Statistics is a form of mathematical analysis that uses quantified models, representations and synopses for a given set of experimental data or real-life studies. The science of collecting, organizing, presenting, analyzing and interpreting data to assist in making more effective decisions is called Statistics.

**Q2.** **Methods of organizing, summarizing, and presenting data in an informative way are called:**

(a) Descriptive statistics

(b) Inferential statistics

(c) Theoretical statistics

(d) Applied statistics

Option: A.

Explanation: Descriptive statistics is the term given to the analysis of data that helps describe, show or summarize data in a meaningful way such that, for example, patterns might emerge from the data.

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**Q3.** **The methods used to determine something about a population on the basis of a sample is called:**

(a) Inferential statistics

(b) Descriptive statistics

(c) Applied statistics

(d) Theoretical statistics

Option: A.

Explanation: we use inferential statistics to try to infer from the sample data what the population might think. Or, we use inferential statistics to make judgments of the probability that an observed difference between groups is a dependable one or one that might have happened by chance in this study.

**Q4. When the characteristic being studied is non - numeric, it is called a:**

(a) Quantitative variable

(b) Qualitative variable

(c) Discrete variable

(d) Continuous variable

Option: B.

Explanation: A qualitative variable, also called a categorical variable, are variables that are not numerical. It describes data that fits into categories. For example: Eye colors (variables include: blue, green, brown, hazel)

**Q5**.** When the variable studied can be reported numerically, the variable is called a:**

(a) Quantitative variable

(b) Qualitative variable

(c) Independent variable

(d) Dependent variable

Option: A.

Explanation: Variables that have are measured on a numeric or quantitative scale. Ordinal, interval and ratio scales are quantitative. A country's population, a person's shoe size, or a car's speed are all quantitative variables.

**Q6.** **A specific characteristic of a population is called:**

(a) Statistic

(b) Parameter

(c) Variable

(d) Sample

Option: B.

Explanation: Parameters in statistics is an important component of any statistical analysis. In simple words, a parameter is any numerical quantity that characterizes a given population or some aspect of it. This means the parameter tells us something about the whole population.

**Q7.** **A specific characteristic of a sample is called:**

(a) Variable

(b) Constant

(c) Parameter

(d) Statistic

Option: D.

Explanation: A measurable characteristic of a population, such as a mean or standard deviation, is called a parameter; but a measurable characteristic of a sample is called a statistic.

**Q8.** **A set of all units of interest in a study is called:**

(a) Sample

(b) Population

(c) Parameter

(d) Statistic

Option: B.

Explanation: Population is the entire pool from which a statistical sample is drawn. The information obtained from the sample allows statisticians to develop hypotheses about the larger population.

**Q9.** **A part of the population selected for study is called a:**

(a) Variable

(b) Data

(c) Sample

(d) Parameter

Option: C.

Explanation: In statistics and quantitative research methodology, a data sample is a set of data collected and/or selected from a statistical population by a defined procedure. Typically, the population is very large; making a census or a complete enumeration of all the values in the population is either impractical or impossible.

**Q10**. **Listing of the data in order of numerical magnitude is called:**

(a) Raw data

(b) Arrayed data

(c) Discrete data

(d) Continuous data

Option: B.

Explanation: Listing of the data in order of numerical magnitude is called Arrayed data.

**Q11**. **Listings of the data in the form in which these are collected are known as:**

(a) Secondary data

(b) Raw data

(c) Arrayed data

(d) Qualitative data

Option: B.

Explanation: Raw data (sometimes called source data or atomic data) is data that has not been processed for use. A distinction is sometimes made between data and information to the effect that information is the end product of data processing. Raw data that has undergone processing is sometimes referred to as cooked data.

**Q12.** **Data that are collected by anybody for some specific purpose and use are called:**

(a) Qualitative data

(b) Primary data

(c) Secondary data

(d) Continuous data

Option: B.

Explanation: Primary data means original data that has been collected specially for the purpose in mind. It means someone collected the data from the original source first hand. Data collected this way is called primary data.

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**Q13.** **The data which have under gone any treatment previously is called:**

(a) Primary data

(b) Secondary data

(c) Symmetric data

(d) Skewed data

Option: B.

Explanation: Secondary data refers to data that was collected by someone other than the user. Common sources of secondary data for social science include censuses, information collected by government departments, organisational records and data that was originally collected for other research purposes.

**Q14.** **The data obtained by conducting a survey is called:**

(a) Primary data

(b) Secondary data

(c) Continuous data

(d) Qualitative data

Option: A.

Explanation: Survey researchers employ a variety of techniques in the collection of survey data. People can be contacted and surveyed using several different modes: by an interviewer in-person or on the telephone (either a landline or cellphone), via the internet or by paper questionnaires (delivered in person or in the mail).

The choice of mode can affect who can be interviewed in the survey, the availability of an effective way to sample people in the population, how people can be contacted and selected to be respondents, and who responds to the survey. In addition, factors related to the mode, such as the presence of an interviewer and whether information is communicated aurally or visually, can influence how people respond. Surveyors are increasingly conducting mixed-mode surveys where respondents are contacted and interviewed using a variety of modes.

**Q15**. **A survey in which information is collected from each and every individual of the population is known as:**

(a) Sample survey

(b) Pilot survey

(c) Biased survey

(d) Census survey

Option: D.

Explanation: A census is a survey conducted on the full set of observation objects belonging to a given population or universe. Context: A census is the complete enumeration of a population or groups at a point in time with respect to well defined characteristics: for example, population, production, traffic on particular roads.

**SOLUTIONS : **

Sr. No. |
Answers |

1. | D |

2. | A |

3. | A |

4. | B |

5. | A |

6. | B |

7. | D |

8. | B |

9. | C |

10. | B |

11. | B |

12. | B |

13. | B |

14. | A |

15. | D |