About this video
This video reads a two-way table of column relative frequencies about gender and voting in the 2012 US presidential election. It explains that each column (Men, Women) adds to 1.00, then compares 52% of men to 43% of women voting for Romney to conclude men were more likely to vote for Romney.
You'll be able to
- read a column relative frequency as a percent of that column's group.
- compare two groups using column relative frequencies to answer a 'more likely' question.
Key words
- two-way table
- A table that sorts data by two categories at once, like gender and who someone voted for.
- column relative frequency
- The fraction of one column's group that falls in a row, such as 0.42 of men voting for Obama.
- column total
- The sum of a column; in a relative frequency table it is 1.00, or 100 percent.
Transcript
- The two-way table of column relative frequencies below shows data on gender and voting preferences during the 2012 United States presidential election. They give us all this data. They give us this, as they say, the two-way table of column relative frequencies.
So for example this column right over here is Men. The column total is 1.00, or you could say 100 percent. And we can see that 0.42 of the Men or 42 percent of the Men voted for Obama. We can see 52% of the Men or 0.52 of the Men voted for Romney. And we can see that the Other, neither Obama, 6 percent went for neither Obama nor Romney.
And for Women, 52 percent went for Obama, 43 percent went for Romney and 5 percent went for Other. And then these, this 52 plus 43 plus 5 will add up to 100 percent of the women. During the 2012 United States presidential election, were male voters more likely to vote for Romney than female voters?
So let's see. If we, there are a couple of ways you could think about it. Well, actually, let's go this way. Male voters, if you were a man, 52 percent of them voted for Romney. While for the Women, 43 percent of them voted for Romney. So a man was more likely.
If you randomly picked a man who voted, there was a 52 percent chance they voted for Romney, while if you randomly picked a woman, there was a 43 percent, of women who voted, there was a 43 percent chance that she voted for Romney. So yes, male voters were more likely to vote for Romney than female voters.
So the answer is Yes. And we're done.
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