Estimating Standard Deviation with the Range Rule of Thumb. In Exercises,refer to the data in the indicated exercise. After finding the range of the data, use the range ruh of thumb to estimate the value of the standard deviation. Compare the result to the standard deviation computed with all of the data.

IQ Scores Data Set 6 and use the listed IQ scores.

Answer

IQ |
(x-) |

96 |
25 |

89 |
144 |

87 |
196 |

87 |
196 |

101 |
0 |

103 |
4 |

103 |
4 |

96 |
25 |

127 |
676 |

126 |
625 |

101 |
0 |

96 |
25 |

93 |
64 |

88 |
169 |

94 |
49 |

85 |
256 |

97 |
16 |

114 |
169 |

113 |
144 |

124 |
529 |

Total=2020 |
3316 |

Step 1 of 3</p>

Range=Largest value-Smallest value

=127-85

=42

Standard deviation with range rule of thumb=Range/4

=42/4

=10.5

Step 2 of 3</p>

= =

=101

Variance==

=165.8