Frequency Distribution Table 2-2 on page 45 is a frequency distribution summarizing the IQ scores of a group of children with low lead exposure. Is it possible to identify the original list of the 78 individual IQ scores from Table 22? Why or why not?

Answer :

Step 1 of 1 :

Given, the frequency distribution of IQ scores of low lead group is

IQ score |
Frequency |

50-69 |
2 |

70-89 |
33 |

90-109 |
35 |

110-129 |
7 |

130-149 |
1 |

From the above frequency distribution, It is not possible to identify the original list of 78 individual IQ scores . For each class, the frequency tells us how many values fall within the given range of values, but there is no way to determine the exact IQ scores represented in the class.