For a hypothesis test of H₀:p₁ p₂= 0 against the alternative H_a:p₁ p₂ 0, the test statistic is found to be 1.8. Which of the following statements can you make about this finding? (4 points)

	The result is significant at both = 0.05 and = 0.01.
	The result is significant at = 0.05 but not at = 0.01.
	The result is significant at = 0.01 but not at = 0.05.
	The result is not significant at either = 0.05 or = 0.01.
	The result is inconclusive because we don't know the value of p.

2.

(06.05 LC) Which of the following conditions must be met to conduct a two-proportion significance test? (4 points)

1. The populations are independent.
2. The probabilities of success multiplied by the sample sizes are greater than or equal to 10 and the probabilities of failure multiplied by the sample sizes are greater than or equal to 10 for each population.
3. The sample sizes are greater than 30.

	I only
	II only
	III only
	I and II only
	I, II, and III

3.

(06.05 MC)

A new anxiety medication has been manufactured and a study is being All changes saved determine whether its effectiveness depends on close. When 40 milligrams of the medication was administered to a simple random sample (SRS) of 60 patients, 21 of them demonstrated lower stress levels. When 75 milligrams of the medication was administrated to another SRS of 85 patients, 34 of them demonstrated lower stress levels. Which of the following test statistics is an appropriate hypothesis test? (4 points) 0 (0.35-0.4)-0 z = {0.3793 ( 1 0.3793 ) + 0.3793 ( 1 0.3793 ) 60 05 O (0.35-0.4)0 z = {0.3793 ( 1 0.3793 ) + 0.3793 ( 1 0.3793 ) 145 145 Q (0.350.4)0 z: {035(1035 )+0.4(10.4) 60 85 Q (0.35-0.4)-0 z: 0.35(10.35)+0.4(10.4) J 145 145 O (0.35-0.4)0 z = {0.3793 ( 10.3793 ) + 0.3193 (1 0.3793 ) 40 75