State both the null and alternative hypotheses.  Provide the decision rule for making this decision. Use an alpha level of 5%.  Show all of the work necessary to calculate the appropriate statistic.

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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A researcher was interested in studying if there is a significant relationship between the severity

of COVID 19 and blood types of individuals. 2400 individuals were studied and the results are shown below.

 

Condition Blood Type

O A B AB Total

Critical 64 44 20 8 136

Severe 175 129 50 15 369

Moderate 211 528 151 125 1015

Mild 200 400 140 140 880

Total 650 1101 361 288 2400

 

  1. State both the null and alternative hypotheses. 
  2. Provide the decision rule for making this decision. Use an alpha level of 5%. 
  3. Show all of the work necessary to calculate the appropriate statistic. 
  4. What conclusion are you allowed to draw?
  5. . Would your conclusion change at the 10% level of significance?
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