#### Question

Find the mean and variance for the first 10 multiples of 3

#### Solution

The first 10 multiples of 3 are

3, 6, 9, 12, 15, 18, 21, 24, 27, 30

Here, number of observations, *n *= 10

x_{i} |
`(X_i - barX)` | `(X_i - barX)^2` |

3 | -13.5 | 182.25 |

6 | -10.5 | 110.25 |

9 | -7.5 | 56.25 |

12 | -4.5 | 20.25 |

15 | -1.5 | 2.25 |

18 | 1.5 | 2.25 |

21 | 4.5 | 20.25 |

24 | 7.5 | 56.25 |

27 |
10.5 |
110.25 |

30 | 13.5 | 182.25 |

742.5 |

Is there an error in this question or solution?

Solution Find the Mean and Variance for the First 10 Multiples of 3 Concept: Variance and Standard Deviation - Standard Deviation.