Pupils are asked to investigate the number of elecronic devices such a cell phones,talets, laptops, etc they own | |
---|---|

class survey below | |

Number of devices | Frequency |

0 | 3 |

1 | 5 |

2 | 6 |

3 | 4 |

4 | 5 |

5 | 2 |

6 | 3 |

calculate the mean number of devices for classroom | |

5+6_{2}+4_{3}+5_{4}+2_{5}+6_{3
= 77} |