A student takes a multiple-choice test that has 40 questions. Each question has 5 choices. The student did not study for the test and decides to randomly guess at each question. (Hint: The probability of guessing correctly is 0.2.) Round probabilities to four decimal places. a )Find the probability the student gets exactly 10 problems correct._______________ (Show work.) b) Calculate the mean.____________ c) Calculate 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 student takes a multiple-choice test that has 40 questions. Each question has 5 choices. The student did
not study for the test and decides to randomly guess at each question. (Hint: The
correctly is 0.2.) Round probabilities to four decimal places.
a )Find the probability the student gets exactly 10 problems correct._______________
(Show work.)
b) Calculate the
c) Calculate the standard deviation._
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