One-sample tests for a population mean

STA 121. Practice questions, not past papers.

Lessons

• Choose z or t from assumptions
• Follow a complete testing sequence

Practice questions

1. For a normal population with unknown SD, a one-sample mean test uses what?

   Statistics study edition practice item Q261; Source: T108-113

2. If population σ is known, the SE of the sample mean is what?

   Statistics study edition practice item Q262; Source: T108-113

3. For a left-tailed t test, evidence against H0 is what?

   Statistics study edition practice item Q263; Source: T108-113

4. Which statement about n=30 is sound?

   Statistics study edition practice item Q264; Source: T108-113

5. For a one-sample t statistic, n=10, sample mean=2.24, sample SD=0.36, null mean=2. Find the signed statistic. Give the value to 4 decimal places.

   Statistics study edition practice item Q265; Source: T109-112

6. For a one-sample t statistic, n=25, sample mean=54, sample SD=10, null mean=50. Find the signed statistic. Give the value to 4 decimal places.

   Statistics study edition practice item Q266; Source: T109-112

7. For a one-sample t statistic, n=16, sample mean=18, sample SD=4, null mean=20. Find the signed statistic. Give the value to 4 decimal places.

   Statistics study edition practice item Q267; Source: T109-112

8. For a one-sample t test, degrees of freedom are _____.

   Statistics study edition practice item F087; Source: T108-113

9. A left-tailed alternative seeks a sufficiently _____ signed statistic.

   Statistics study edition practice item F088; Source: T108-113

Topic gap report