Suppose that each student has probability p of correctly answering a question chosen at random from a universe of possible questions. (A strong student has a higher p than a weak student.) The correctness of an answer to a question is independent of the correctness of answers to other questions. Jennifer is a good student for whom p = 0.90. You want to use the Normal approximation to find the probability that Jennifer scores 85% or lower on a 200-question test. a:What is the standard error (standard deviation) of the sample proportion? b: What is the z-value corresponds to ?̅= 0.85? c: What is the probability that Jennifer scores 85% or lower on a 200-question t
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.
Suppose that each student has
a:What is the standard error (standard deviation) of the sample proportion? b: What is the z-value corresponds to ?̅= 0.85?
c: What is the probability that Jennifer scores 85% or lower on a 200-question t
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