Given the 5 categories in the table below, test the claim that the categories are equally likely to be selected at a α=0.05 significance level. Category Observed Frequency Expected Frequency A 7   B 7   C 22   D 10   E 19   Complete the table by calculating the expected frequencies.  What is the chi-square test statistic? Round to three decimal places. χ2=  What are the degrees of freedom? d.f.=  What is the pp-value for this sample? Round to four decimal places. p-value =  Is the p-value less than α?     Make a decision.       Make a conclusion. There is sufficient evidence to warrant rejection of the claim that all 5 categories are equally likely to be selected. There is not sufficient evidence to warrant rejection of the claim that all 5 categories are equally likely to be selected. The sample data support the claim that all 5 categories are equally likely to be selected. There is not sufficient sample evidence to support the claim that all 5 categories are equally likely to be selected.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Given the 5 categories in the table below, test the claim that the categories are equally likely to be selected at a α=0.05 significance level.

Category Observed
Frequency
Expected
Frequency

A

7  
B 7  
C 22  
D 10  
E 19  
  1. Complete the table by calculating the expected frequencies. 

  2. What is the chi-square test statistic? Round to three decimal places.
    χ2= 

  3. What are the degrees of freedom?
    d.f.

  4. What is the pp-value for this sample? Round to four decimal places.
    p-value = 

  5. Is the p-value less than α?    

  6. Make a decision.
         

  7. Make a conclusion.
    • There is sufficient evidence to warrant rejection of the claim that all 5 categories are equally likely to be selected.
    • There is not sufficient evidence to warrant rejection of the claim that all 5 categories are equally likely to be selected.
    • The sample data support the claim that all 5 categories are equally likely to be selected.
    • There is not sufficient sample evidence to support the claim that all 5 categories are equally likely to be selected.
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