Question: Directions: Below are Observed data from an exam. The table describes the test takers whose overall scores ranked in the top 1/3, the middle 1/3

Directions: Below are Observed data from an exam. The table describes the test takers whose overall scores ranked in the top 1/3, the middle 1/3 and the bottom 1/3 along with the number of students in each group who got the item correct. Ideally, a good test item is able to discriminate between students performing well and students performing poorly on the exam (i.e., those who do well on the exam should get this item correct, and those who do not do well on the exam should get the item incorrect). Use the Chi-Square formula (

\fO E Correct Incorrect Correct Incorrect Top 1/3 20 9 29 Top 1/3 Mid 1/3 9 8 17 Mid 1/3 Low 1/3 10 15 25 Low 1/3 39 32 71 O - E (0-E) Correct Incorrect Correct Incorrect Top 1/3 Top 1/3 Mid 1/3 Mid 1/3 Low 1/3 Low 1/3 (0-E)'/E Correct Incorrect Top 1/3 X = Mid 1/3 Degrees of Freedom = Low 1/3 Critical Value = Good test item? YES or NO

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Chi-Square Test of Independence Directions: Below are Observed data from an exam. The table describes the test takers whose overall scores ranked in the top 1/3, the middle 1/3 and the bottom 1/3...

Summarize the attached document of the WDR 2018 OVERVIEW Learning to realize education's promise Learning to realize education's promise Assess learning Act on evidence Align actors to make it a...

Demand and Supply Discussion Question: Applications-Ubereconomics Please read the article below and respond to the follow-up question: Why Uber Is an Economist's Dream Does 'surge pricing'...

Demand and Supply Discussion Question: Applications-Ubereconomics Please read the article below and respond to the follow-up question: Using Big Data to Estimate Consumer Surplus: The Case of Uber...

SA-TIED YOUNG SCHOLARS PROGRAMME Young Scholars This paper was produced as a part of the SA-TIED Young Scholars' programme. The programme is a part of SATIED's capacity building initiatives, designed...

HELP PLEAZEEEE MEASURES OF POSITION FOR UNGROUPED DATA please help it's so hard Ill. Introduction Our lesson today is about measures of position. Measures of position, also known as quantiles,...

Describing Data Once we have collected data from surveys or experiments, we need to summarize and present the data in a way that will be meaningful to the reader. We will begin with graphical...

Reflect and discuss the distinction and purpose of the case below. Background of the Study The United Nations launched the 2030 Agenda for Sustainable Development in 2015 which consists of 17 goals...

Set Week Three During this week, we will look at ways of testing multiple (more than two) data samples at the same time. We will continue to use the data and assignment file that we opened in Week 2,...

Week 2: Understanding and Exploring Assumptions You will submit one Word document, including your SPSS output. 1. Why do we care whether the assumptions required for statistical tests are met? (Tip:...

Consider the function /(x)-e in the interval (-2, 21. After constructing a sixth order approximate polynomial of fx) by taking 19 equidistant points (-2, 21 find the value of the difference between...

The following data were taken from the general ledgers and other data of Alpha Manufacturing, Inc., and Bravo Merchandising Co. on April 30 of the current year: Merchandise inventory, April 1 ....

Round each of these numbers to the given degree of accuracy. a 78.023 (2 s.f.) b 0.067 91 (3 s.f.) c 1.549 62 (4 s.f.) d 12 452 673 (5 s.f.)

Which of the following agreements would the court consider void? a. illegal gambling O b. minor's purchase O c. lease assignment O d. all of the above

8. Now spend two to three hours walking around listening to what people are saying. Place yourself in a place where you can hear what people are saying clearly and distinctly, for example in a cafe,...

5. Think through your own way of representing the world. What is your main pattern: Visually, verbally, emotions, smells, tastes?

1. Think of a situation in the workplace where you meet a person for the first time, which you know you will have a lot to do with in the future. a. Name three things about yourself that you will try...