Question: 5. For the same question as described in Exercise 4, that is, concerning the effect of HT controlling for the other variables in the model,

5. For the same question as described in Exercise 4, that is, concerning the effect of HT controlling for the other variables in the model, describe the Wald test for this effect by providing the null hypothesis, the formula for the test statistic, and the distribution of the test statistic under the null hypothesis.

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