In Exercises, find the mean of the data summarized in the given frequency distribution. Also, compare the computed means to the actual means obtained by using the original list of data values, which areasfoüows: 84.4.

Verbal IQ Score of Subject Exposed to Lead |
Frequency |

50–59 |
4 |

60–69 |
10 |

70–79 |
25 |

80–89 |
43 |

90–99 |
26 |

100–109 |
8 |

110–119 |
3 |

120-129 |
2 |

Answer :

Step 1 of 1 :

Given, Verbal IQ score of subject exposed to lead and frequency

Verbal IQ score of subject exposed to lead |
Frequency |

50-59 |
4 |

60-69 |
10 |

70-79 |
25 |

80-89 |
43 |

90-99 |
26 |

100-109 |
8 |

110-119 |
3 |

120-129 |
2 |

The claim is to find the mean of the data and compare the computed means to the actual means obtained by using the original list of data values. That is 84.4

Where N = 4+10+25+43+26+8+3+2 = 121