# Standard deviation

Find the standard deviation for the dataset (grouped data):

Age (years) | No. Of Persons |
---|---|

0-10 | 15 |

10-20 | 15 |

20-30 | 23 |

30-40 | 22 |

40-50 | 25 |

50-60 | 10 |

60-70 | 5 |

70-80 | 10 |

### Correct answer:

**Showing 1 comment:**

**Dr Math**

Check also with our stddev calculator - input is given as frequency table:

https://www.hackmath.net/en/calculator/standard-deviation?input=5+15+25+35+45+55+65+75%0D%0Af%3A15+15+23+22+25+10+5+10

x is Mid Interval Value and f is frequency

https://www.hackmath.net/en/calculator/standard-deviation?input=5+15+25+35+45+55+65+75%0D%0Af%3A15+15+23+22+25+10+5+10

x is Mid Interval Value and f is frequency

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