Skewness, kurtosis and summary output

STA 111. Practice questions, not past papers.

Lessons

• Asymmetry and Pearson coefficients
• Moments and kurtosis

Practice questions

1. A distribution with a long right tail is described as what?

   Statistics study edition practice item Q070; Source: T34-42

2. Normal-distribution excess kurtosis equals what?

   Statistics study edition practice item Q071; Source: T34-42

3. Pearson's second skewness coefficient is which expression?

   Statistics study edition practice item Q072; Source: T34-42

4. Which claim about a symmetric distribution is valid?

   Statistics study edition practice item Q073; Source: T34-42

5. Mean=20, median=18, SD=4. Find Pearson second skewness. Give the value to 4 decimal places.

   Statistics study edition practice item Q074; Source: T34-35

6. Mean=12, median=14, SD=3. Find Pearson second skewness. Give the value to 4 decimal places.

   Statistics study edition practice item Q075; Source: T34-35

7. Mean=30, median=30, SD=5. Find Pearson second skewness. Give the value to 4 decimal places.

   Statistics study edition practice item Q076; Source: T34-35

8. If ordinary kurtosis β2=5.4, what is excess kurtosis? Give the value to 4 decimal places.

   Statistics study edition practice item Q077; Source: T35-36

9. A long right tail indicates _____ skewness.

   Statistics study edition practice item F026; Source: T34-42

10. Normal-distribution kurtosis, before subtracting three, equals _____.

    Statistics study edition practice item F027; Source: T34-42

Topic gap report