Suppose that all the students registered to the probability and statistics course have to buy textbook. The 46 % of all students demand a new book, on the other hand the other (54) % want a used text book. Consider randomly selecting 40 purchasers. a. What are the mean value and standard deviation of the number who want a new copy of the book? b. What is the probability that the number who want brand-new books is more than 1.5σ away from the mean value?
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.
4) Suppose that all the students registered to the probability and statistics course have to buy textbook. The 46 % of all students demand a new book, on the other hand the other (54) % want a used text book. Consider randomly selecting 40 purchasers.
a. What are the
b. What is the probability that the number who want brand-new books is more than 1.5σ away from the mean value?
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