Median, mode and robust location

STA 111. Practice questions, not past papers.

Lessons

• Ungrouped median and mode
• Grouped median and mode

Practice questions

1. Before finding an ungrouped median, what should be done?

   Statistics study edition practice item Q043; Source: T21-25

2. The mode is which value?

   Statistics study edition practice item Q044; Source: T21-25

3. For an even number of observations, the median is what?

   Statistics study edition practice item Q045; Source: T21-25

4. What does a grouped median formula primarily do?

   Statistics study edition practice item Q046; Source: T21-25

5. Find the median of the ordered values 2, 4, 6, 8, 10, 12. Give the value to 4 decimal places.

   Statistics study edition practice item Q047; Source: T21-22

6. Find the median of the ordered values 1, 4, 8, 10, 15. Give the value to 4 decimal places.

   Statistics study edition practice item Q048; Source: T21-22

7. Find the median of the ordered values 3, 3, 4, 5, 18, 20. Give the value to 4 decimal places.

   Statistics study edition practice item Q049; Source: T21-22

8. Using N=45, L=49.5, preceding cumulative count=15, median-class frequency=11 and width=10, estimate the median. Give the value to 4 decimal places.

   Statistics study edition practice item Q050; Source: T22-23

9. For a modal class with L=49.5, width=10 and frequencies previous=8, modal=11, next=9, estimate the mode. Give the value to 4 decimal places.

   Statistics study edition practice item Q051; Source: T24-25

10. The most frequent value is a _____.

    Statistics study edition practice item F017; Source: T21-25

Topic gap report