The percent of people who have a commute time to work of 15 minutes or more is very likely to be between 78 % and 84 % . This can be written mathematically as 78 < p < 84. Express this in the form of a + b.
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.
Obtain the point estimate of the proportion.
The point estimate of the proportion is obtained below:
The formula of point estimate is defined as,
It is clear that the Lower confidence limit is 78 and
The upper confidence limit is 84.
The required value is,
Thus, the value of the point estimate is 81.
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