In September 2005, 33% of adult Americans believed in haunted houses. In a poll conducted in June 2010, 370 of 1002 adult Americans aged 18 or older believed haunted houses. Is there sufficient evidence to believe that the proportion of adult Americans who believed in haunted houses has increased at the alpha = 0.05 level of significance.
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.
In September 2005, 33% of adult Americans believed in haunted houses. In a poll conducted in June 2010, 370 of 1002 adult Americans aged 18 or older believed haunted houses. Is there sufficient evidence to believe that the proportion of adult Americans who believed in haunted houses has increased at the alpha = 0.05 level of significance.
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