Frequency tables and statistical graphs

STA 111. Practice questions, not past papers.

Lessons

• Build and verify frequency distributions
• Select and draw graphs

Practice questions

1. Relative frequency for a class with count f out of N is what?

   Statistics study edition practice item Q017; Source: T10-15, T43-47

2. A less-than ogive plots cumulative counts against which class values?

   Statistics study edition practice item Q018; Source: T10-15, T43-47

3. For unequal class widths, histogram area represents frequency when height equals what?

   Statistics study edition practice item Q019; Source: T10-15, T43-47

4. Which graph best displays frequencies of named categories?

   Statistics study edition practice item Q020; Source: T10-15, T43-47

5. A class contains 11 observations out of 45. What is its relative frequency in percent? Give the value to 4 decimal places.

   Statistics study edition practice item Q021; Source: T12-13

6. A class contains 8 observations out of 40. What is its relative frequency in percent? Give the value to 4 decimal places.

   Statistics study edition practice item Q022; Source: T12-13

7. A class contains 18 observations out of 60. What is its relative frequency in percent? Give the value to 4 decimal places.

   Statistics study edition practice item Q023; Source: T12-13

8. T12 frequencies are 3,4,8,11,9,6,4. What is cumulative frequency through the fourth class?

   Statistics study edition practice item Q024; Source: T10-15, T43-47

9. For observations rounded to whole units, what is the midpoint of class 30-39? Give the value to 4 decimal places.

   Statistics study edition practice item Q025; Source: T12-13

10. Relative frequency is class frequency divided by the _____ frequency.

    Statistics study edition practice item F009; Source: T10-15, T43-47

Topic gap report