1. If X ~ B (n, p) with E (X) = 3 and V (X) = 2.4) calculate P (X> = 3) 2.An aptitude test consists of 10 questions with five alternatives each, of which one is correct. a. If a student answers each random test question, what is the average number of successful questions? b. What is the probability of answering at least one question correctly? c. If the qualification is done as follows: Each question well answered is worth 2 points. K points are discounted for each wrong answer. Determine the value of k so that the expected grade of a student who answers the 10 questions at random is zero.
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.
1. If X ~ B (n, p) with E (X) = 3 and V (X) = 2.4) calculate P (X> = 3)
2.An aptitude test consists of 10 questions with five alternatives each, of which one is correct.
a. If a student answers each random test question, what is the average number of successful questions?
b. What is the probability of answering at least one question correctly?
c. If the qualification is done as follows: Each question well answered is worth 2 points. K points are discounted for each wrong answer. Determine the value of k so that the expected grade of a student who answers the 10 questions at random is zero.
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