Stat 1102 lecture notes 9

We may then consider this to be a multinomial

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We may then consider this to be a multinomial experiment with r x c possible outcomes. o The sample size, n, will be large enough so that, for every cell, the estimated expected count will be equal to 5 or more. Two-Way Frequency Tables Entries in the "Total" row and "Total" column are called marginal frequencies or the marginal distribution. Entries in the body of the table are called joint frequencies Relative Frequency of Table The relative frequencies in the body of the table are called conditional frequencies or the conditional distribution. Two-way tables can show relative frequencies for the whole table, for rows, or for columns. The table to the right shows relative frequencies for the whole table. Below, the table on the left shows relative frequencies for rows; and the table on the right shows relative frequencies for columns. Each type of relative frequency table makes a different contribution to understanding the relationship between gender and preferences for leisure activities. For example, "Relative Frequency for Rows" table most clearly shows the probability that each gender will prefer a particular leisure activity.
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