6.74 Landlines According to the Centers of Disease Control and Prevention, 44% of U.S. households still had landline phone service. Suppose a random sample of 60 U.S. households is taken. a. Find the probability that exactly 25 of the households sampled still have a landline. b. Find the probability that more than 25 households still have a landline. c. Find the probability that at least 25 households still have a landline.
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.
6.74 Landlines According to the Centers of Disease Control
and Prevention, 44% of U.S. households still had landline phone
service. Suppose a random sample of 60 U.S. households is taken.
a. Find the
have a landline.
b. Find the probability that more than 25 households still have a landline.
c. Find the probability that at least 25 households still have a landline.
d. Find the probability that between 20 and 25 households still have a
landline.
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