Some tests use a true-false question format. Use a statistical test to determine whether “True” is the correct answer on half the questions. True-false tests from several disciplines were studied. The result below for 90 items is typical. Ninety Items Classified by Correct Answer “True”= 55 “False” =35 (a) What is the expected number of “True” and “False” correct answers if development of True/False items is random without regard to the correct outcome for a particular item? (b) What is the correct null hypothesis here in both written and symbolic format? (c) What is the value of χ2 goodness of fit for this study? (d) If alpha = .05, is the null rejected (include critical value with answer)?
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.
Some tests use a true-false question format. Use a statistical test to determine whether “True” is the correct answer
on half the questions. True-false tests from several disciplines were studied. The result below for 90 items is typical.
Ninety Items Classified by Correct Answer
“True”= 55
“False” =35
(a) What is the expected number of “True” and “False” correct answers if development of True/False items is
random without regard to the correct outcome for a particular item?
(b) What is the correct null hypothesis here in both written and symbolic format?
(c) What is the value of χ2 goodness of fit for this study?
(d) If alpha = .05, is the null rejected (include critical value with answer)?
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