The response to a survey gave the following observed numbers of 'yes' and 'no' responses:     Response       Yes: 25       No: 55 Test the hypothesis: H0: in the population 1/3 respond 'Yes' and 2/3 respond 'No'. Under the null hypothesis, the expected number of responses would be: 1. Yes = (2 dp)  . No = (2 dp)  2. What is the value of the chi-squared statistic? (2 dp)  3. What are the appropriate degrees of freedom?

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A:

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A: Decision rule : Reject H0 if P-value  <  α

Q: MM

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A: