Wednesday, July 8, 2009

Practice for tomorrow's exam

Consider the contingency table below. The columns represent A and A-bar, the complement of A, while the rows represent B and its complement B-bar. The numbers are the number of element in each intersection.

_______________A____A-bar_____row totals
B_____________25________________75
B-bar_________________50___________
col. totals___90_____________________grand total

Use the numbers from the filled in table to find the cardinalities in each section.

Cardinality in white section =
Cardinality in yellow section =
Cardinality in gray section =
Cardinality in cyan section =

Answers in the comments.
at

1 comment:

  1. Prof. HubbardJuly 8, 2009 at 7:09 PM

    Here is the table all filled in.

    ____________A____A-bar__row totals
    B__________25_____50______75
    B-bar______65_____50_____115
    col. total_90____100_____190 grand total

    Cardinality in white section = 50
    Cardinality in yellow section = 65
    Cardinality in gray section = 25
    Cardinality in cyan section = 50

    The 50 in white is the 50 from the second row and second column.

    The 50 in the cyan is the first row and second column.

    ReplyDelete

If you have general questions, you can leave them here and Professor Hubbard will answer them.

Note: Only a member of this blog may post a comment.