The total number of students: N=4+8+11+15+12+6+3=59
Therefore, the corresponding partial frequencies (xi) are 4/59, 8/59, 11/59, 15/59, 12/59, 6/59, 3/59
The accumulated relative frequencies can be found by summarizing Si=x1+⋯+xi or by the formula Si=Si−1+xi.
S1=4/59, S2=(4+8)/59=12/59, S3=(12+11)/59=23/59, S4=(23+15)/59=38/59, S5=(38+12)/59=50/59, S6=(50+6)/69=56/59,
S7=(56+3)/59=1
Put the obtained midpoints of the intervals, relative frequencies and accumulated relative frequencies into the table:
Draw the cumulative frequency curve:
Comments
Leave a comment