A CBS News poll involved a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below. better same worse Republican 38 104 44 Democrat 12 87 137 none 21 90 118 If we randomly select one of the adults who participated in this study, compute the following probabilities. (round to four decimal places) a. PP (affiliated with neither party) == b. PP (better) == c. PP (better|affiliated with neither party) == d. PP (affiliated with neither party|better) == e. PP (affiliated with neither party and better)
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
A CBS News poll involved a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below.
| better | same | worse | |
|---|---|---|---|
| Republican | 38 | 104 | 44 |
| Democrat | 12 | 87 | 137 |
| none | 21 | 90 | 118 |
If we randomly select one of the adults who participated in this study, compute the following probabilities. (round to four decimal places)
| a. PP (affiliated with neither party) == | |
| b. PP (better) == | |
| c. PP (better|affiliated with neither party) == | |
| d. PP (affiliated with neither party|better) == | |
| e. PP (affiliated with neither party and better) == |
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