Telephone survey. A telephone survey uses a random digit dialing machine to call subjects. The random digit dialing machine is expected to reach a live person 15% of the time. What is the probability of two or fewer successful calls in eight attempts?What is the expected value for the number of contacts in eight attempts? What is the variance for the number of contacts in eight attempts? What is the expected value for the number of contacts for 50 attempts?What is the variance for the number of contacts for 50 attempts?
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.
Telephone survey. A telephone survey uses a random digit dialing
machine to call subjects. The random digit dialing machine is expected to
reach a live person 15% of the time.
What is the probability of two or fewer successful calls in eight attempts?What is the
What is the variance for the number of contacts in eight attempts? What is the expected value for the number of contacts for 50 attempts?What is the variance for the number of contacts for 50 attempts?
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