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Part CCSIR NET June 2024one-degree-of-freedom-goes-to-the-total

One degree of freedom goes to the total

Consider a six faced die whose i-th face is marked with i dots, i = 1, 2, …, 6. In a single random throw of the die, let denote the probability that the obtained upper face has i dots, i = 1, 2, …, 6. The die is rolled 240 times independently and the following result is obtained — face observed 1, 2, 3, 4, 5, 6 with frequencies 40, 55, 40, 25, 35, 45 respectively. Suppose we want to test for i = 1, 2, …, 6; against for at least one i. It is given that . Based on the asymptotic goodness of fit test for testing against , which of the following statements are true?

  1. A. is rejected at 5% level of significance
  2. B. is rejected at 1% level of significance
  3. C. is not rejected at 5% level of significance
  4. D.Observed value of the test statistic is 12.5

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward.

See pricing

50 are analysed free — try those first.

Related counterexample: Any interval of the form [X̄ − (S/√n)t, ∞) with a 90% quantile t is a 90% confidence interval

More on this topic

The chapter behind this: Standard tests and confidence intervals — free to read

From Hypothesis TestingLikelihood ratio and standard tests

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