Review Test

1. 1. A researcher assumes that male students perform better in Mathematics than female students.

• Non-Directional

• Directional (right-tailed)

• Directional (left-tailed)

2. 2. An expert wants to know if social media use has a significant effect on students' stress level.

• Non-directional

• Directional (Right-tailed)

• Directional (Left-tailed)

3. 3. A teacher wants to verify if reading can improve a student’s memory.

• Non-directional

• Directional (Right-tailed)

• Directional (Left-tailed)

3. 4. A researcher claims that sleep deprivation can decrease your ability to concentrate.

• Non-directional

• Directional (Right-tailed)

• Directional (Left-tailed)

3. 5. A storekeeper thinks that time of day influences the sale of ice cream.

• Non-directional

• Directional (Right-tailed)

• Directional (Left-tailed)

1. 6. 95% confidence level, two-tailed, z = -1.50

• Reject Null Hypothesis

• Accept Null Hypothesis

1. 7. 99% confidence level, right-tailed, z = 3.10

• Reject Null Hypothesis

• Accept Null Hypothesis

3. 8. 95% confidence level, left-tailed, z = -1.29

• Reject Null Hypothesis

• Accept Null Hypothesis

3. 9. 99% confidence level, two-tailed, z = 4.13

• Reject Null Hypothesis

• Accept Null Hypothesis

3. 10. 95% confidence level, left-tailed, z = -2.5

• Reject Null Hypothesis

• Accept Null Hypothesis