According to The Census Bureau, 60% of adults buy clothing online. a) How many adults did they surveyed in order to be confident that the sample proportion is in error by no more than three percentage points. b) What about if they did not have prior knowledge of the sample proportion, How many adults would they need to survey?
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.
According to The Census Bureau, 60% of adults buy clothing online.
a) How many adults did they surveyed in order to be confident that the sample proportion is in error by no more than three percentage points.
b) What about if they did not have prior knowledge of the sample proportion,
How many adults would they need to survey?
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