StatTutor Lesson - Marginal Distributions

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      Questions 1-3

      76

      Question 1.

      How many columns does a 5x3 table have?

      A.
      B.
      C.
      D.

      Incorrect. A table is described as rxc where r represents the number of rows and c represents the number of columns. So, a 5x3 table has 5 rows and 3 columns.
      Correct. A table is described as rxc where r represents the number of rows and c represents the number of columns. So, a 5x3 table has 5 rows and 3 columns.
      Incorrect. Try again.
      2

      Questions 4-6

      116

      Question 4.

      True or false: The sum of the row totals always equals the sum of the column totals.

      A.
      B.

      Incorrect. This is a correct statement.
      Correct. This is a correct statement.
      Incorrect. Try again.
      2

      Questions 7-11

      258

      Question 7.

      Should a woman ask a man out on a date?
      Yes No Depends Total
      Men 48 23 66 137
      Women 30 69 93 192
      Total 78 92 159 329

      For the data in the above table, what fraction of the respondents answered the question “yes”?

      A.
      B.
      C.
      D.

      Incorrect. The total for the “yes” column is 78. The table total is 329. The fraction of “yes” respondents is 78/329.
      Correct. The total for the “yes” column is 78. The table total is 329. The fraction of “yes” respondents is 78/329.
      Incorrect. Try again.
      2