multiple-choice test involves 20 questions, with four choices for each answer. a.If you guessed the answers to all questions at random, what mark out of 20 would you expect to get? b.If you know the correct answer to eight of the questions, what is your expected score out of 20?. c. The examiner wishes to correct the bias due to students guessing answers. He/she decides to award a negative mark for incorrect answers (with 1 for a correct answer and 0 for no answer given). What negative mark would ensure that the overall mark out of 20 is a true reflection of the student’s ability?
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.
multiple-choice test involves 20 questions, with four choices for each answer.
a.If you guessed the answers to all questions at random, what mark out of 20 would you expect to get?
b.If you know the correct answer to eight of the questions, what is your expected score out of 20?.
c. The examiner wishes to correct the bias due to students guessing answers. He/she decides to award a negative mark for incorrect answers (with 1 for a correct answer and 0 for no answer given). What negative mark would ensure that the overall mark out of 20 is a true reflection of the student’s ability?
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