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** Central Board of Secondary Education (CBSE)**

**Guess Paper – 2012**

**Class – XI**

**Subject – Economics**

STATISTICS FOR ECONOMICS

1. What is a random sample?

2. What is a Lorenz curve?

3. Define statistical series.

4. What is an index number?

5. What is a first step of a project?

6. “Statistics is both science as well as an art” Discuss The statement?

7. Define mode. How is it compute?

8. Write down the various measures of dispersion.

9. Compute the cost living index number using, aggregate expenditure method of the

Following information

Commodities | Q0 | P0 | P1 |

Whet | 20 | 10 | 12 |

Rise | 5 | 30 | 35 |

Ghee | 2 | 20 | 30 |

sugar | 4 | 25 | 40 |

11. Write note on:

a) SENSEX

b) NIFTY

12. Calculate median from the following data set.

Mark in Hindi | 0-10 | 10-20 | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 |

No. of students | 5 | 15 | 18 | 12 | 20 | 15 | 7 | 3 |

13. What are the qualities of a good questionnaire?

14. Describe structure of project report.

15. Calculate mean and standard deviation from the following series.

Mark in Hindi | 20-30 | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 |

No. of students | 5 | 15 | 0 | 22 | 11 | 7 |

16. Discuss the kinds and degrees of correlation?

17. Draw a histogram for the following data and also draw the frequency curve on it.

Monthly income | No. of families |

0-75 | 15 |

75-150 | 90 |

150-225 | 140 |

225-300 | 70 |

300-375 | 35 |

18. A student subject 40 mark in English,65 in Hindi,53 in maths,49 in economics and 55 in statistics. Calculate weighted mean of the marks if weights are respectively 2, 1, 5, 5, and 3.

Or

Mention merits and demerits of Mean. And list out any ** three** examples of ‘scope of averages in your class room’.

19. Following are the marks obtained by 10 students in two subjects, statistics and economics, calculate Spearman’s rank correlation.

Mark in statistics | 20 | 25 | 30 | 45 | 31 | 48 | 21 | 10 | 26 | 34 |

Mark in Economics | 5 | 19 | 20 | 42 | 21 | 47 | 20 | 10 | 12 | 33 |