Home
Class 14
MATHS
If all the natural numbers between 1 and...

If all the natural numbers between 1 and 20 are multiplied by 3, then what is the variance of the resulting series?

A

99.75

B

199.75

C

299.25

D

399.25

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • STATISTICS

    PUNEET DOGRA|Exercise PRE YEAR QUESTIONS |163 Videos

  • SET & RELATION

    PUNEET DOGRA|Exercise PREV YEAR QUESTIONS|65 Videos

  • TRIGONOMETRY

    PUNEET DOGRA|Exercise PREV YEAR QUESTIONS|163 Videos

Similar Questions

Explore conceptually related problems

The sum of all natural numbers between 100 and 200, which are multiples of 3 is :

The variance of 20 observation is 5. If each observation is multiplied by 3, then what is the new variance of the resulting observation?

The variance of 20 observation is 5. If each observation is multiplied by 2, then what is the new variance of the resulting observation?

The variance of 20 observation is 5. If each observation is multiplied by 2, then what is the new variance of the resulting observation?

What is the variance of the first 11 natural numbers ?

PUNEET DOGRA-STATISTICS-PRE YEAR QUESTIONS
  1. Consider the following statements: 1.The algebraic sum of deviations ...

    Text Solution

    |

  2. Let the correlation coefficient between X and Y be 0.6, random variabl...

    Text Solution

    |

  3. If all the natural numbers between 1 and 20 are multiplied by 3, then ...

    Text Solution

    |

  4. In any discrete series (when all values are not sume) if x represents ...

    Text Solution

    |

  5. Which one of the following can be obtained from a histogram ?

    Text Solution

    |

  6. if x(1) gt 0,y(1) gt 0 (1,2 3…. n) are the values of two variable X ...

    Text Solution

    |

  7. The variance of 25 observations is 4. If 2 is added to each observatio...

    Text Solution

    |

  8. Consider the following statements: If 10 is added to each entry on ...

    Text Solution

    |

  9. The average age of a combined group of men and women is 25 years. If t...

    Text Solution

    |

  10. The correlation coefficient computed from a set of 30 observations is ...

    Text Solution

    |

  11. If the regression coefficient of Yon X is-6 and the correlation coeffi...

    Text Solution

    |

  12. The set of bivariate observations (x(1), y(1)), (x(2) y(2)).... (x(n) ...

    Text Solution

    |

  13. The standard deviation sigma of the first N natural numbers can be obt...

    Text Solution

    |

  14. A train covers the first Skm of its journey at a speed of 30km/hr and ...

    Text Solution

    |

  15. The mean and standard deviation of a set of values are 5 and 2 respect...

    Text Solution

    |

  16. In a test in Mathematics 20% of the students obtained first class If t...

    Text Solution

    |

  17. What is the median of a numbers 4.6, 0, 9.3.-4.8. 7.6. 23. 12.7.3.5, 8...

    Text Solution

    |

  18. Consider the following statements I. The sum of deviations from mean...

    Text Solution

    |

  19. Consider the following statements I Mean is independent of change in...

    Text Solution

    |

  20. Let barx be The the mean of x(1),x(2),x(3)…x(n) if x(i) = a +cy(i) ,...

    Text Solution

    |