A survey showed that 75% of internet users are students. If 16 students are selected, (a) Find the probability that at least 14 students will use the internet (b) Find the probability that at most 7 students will use the internet (c) Find the expected value of all student users. (d) Compute the standard deviation.
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 survey showed that 75% of internet users are students. If 16 students are selected,
(a) Find the
(b) Find the probability that at most 7 students will use the internet
(c) Find the
From the provided information,
75% of internet users are students that is p = 0.75
Sample size (n) = 16
The process should follow binomial distribution with probability distribution function as follow:
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