MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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 Is there an association between hair color and body type? The table below shows the results of a researcher's observations of randomly selected people.

Frequencies of Hair Colors for Various Body Types

  Blonde Brunette Red Head
Short and Slender 72 95 51
Short and Pudgy 91 115 79
Tall and Slender 55 107 69
Tall and Heavy 51 116 77

 What can be concluded at the αα = 0.05 significance level?

  1. The test-statistic for this data =  (Please show your answer to three decimal places.)

  2. The p-value for this sample = (Please show your answer to four decimal places.) 

  3. The p-value is Select an answer less than (or equal to) greater than  αα 

  4. Based on this, we should
    • fail to reject the null
    • reject the null
    • accept the null
  5. Thus, the final conclusion is...
    • There is insufficient evidence to conclude that the distribution of hair color is not the same for each body type.
    • There is sufficient evidence to conclude that hair color and body type are independent.
    • There is sufficient evidence to conclude that hair color and body type are dependent.
    • There is insufficient evidence to conclude that hair color and body type are dependent.
    • There is sufficient evidence to conclude that the distribution of hair color is not the same for each body type.
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