A new teaching strategy was implemented in the classroom with the hopes that it

Question

A new teaching strategy was implemented in the classroom with the hopes that it would improve achievement. Suppose the population achievement score was 75 with a standard deviation of 5.

Q1: Based on the researcher’s hunch, what is the null hypothesis?   

Q2: Based on the researcher’s hunch, what is the alternative hypothesis?

Q3: Is this test a one railed test or two railed test?   

Q4: True or False. The rejection region should be established in the lower tail.

Q5: True or False. The rejection region should be established in the upper tail.

Q6: True or False. For an alpha of .05, the critical z* = 1.645

Q7: True or False. For an alpha of .05, the critical z*=1.96

Q8: True or False. Suppose z=3.42 and z*=1.96. We should fail to reject the null hypothesis.

Q9: True or False. If we fail to reject the null hypothesis, we conclude there is insufficient evidence to indicate that the null hypothesis is true.

Explanation / Answer

1. Null Hypothesis: A new teaching strategy was implemented in the classroom with the hopes that it would not   

improve achievement

2. Alternative Hypothesis: A new teaching strategy was implemented in the classroom with the hopes that it

would improve achievement

3. One tailed test

4. False

5. True

6. True

7. False

8. False

9. True

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