Frequency

• What kind of lines do you draw for frequency polygons?

  straight lines and don't join to zero
• what values do you use for a frequency polygon?

  the midpoint
• what kind of line do you use for a cumulative frequency?

  a curve and go from zero
• what kind of values do you use for a cumulative frequency graph?

  the upper bound
• what is the mode from a frequency table/graph?

  the highest frequency
• How to find estimates of the mean from frequency tables?

  1 - midpoint of inequality x frequency = n

  2 - calculate total frequency and total n

  3 - n / total frequency = estimate