Answer:
By averaging the item-difficulty indices for all test items and then dividing by the total number of items on the test.
Explanation:
An item analysis deals with examining of the the response of student of individual test questions. examiners usually have different ways in which they determine the validity of their assessment. the method use to achieve this item analysis is by item-difficulty index and item discrimination index.
determining the validity of student's individual question item is very important as it helps the examiner to know the quality of the whole item and of the test.
The Item-Difficulty Index in the educational field is useful in testing for validity of test question. it is known as the amount or percentage of students who answer the test questions correctly. it is often called P-value. Item-Difficulty has the range of 0-100. the formula is achieve by the number of students who answer a question correctly divided by the total number of students in the class who answered the question(s).
Answer:
The time it takes to transport goods has decreased over time, causing trade to increase.
Explanation: Dude, compare how long it took items to go from here to there back then, and compare it to today. For example, people along the silk road would travel months at a time, sometimes even taking a year just to reach their destination and back. Now compare that to your amazon package you ordered from Japan and came in on same-day delivery.
It takes less time now, so it increases how often the packages arrive. Let me know if you need anymore help.
If the left arm of the driver and arm is extended upwards the meaning is that they want to turn to the left.
<h3>What are driving signals?</h3>
These are the signals that road users such as drivers use to pass messages across to the other drivers on the road.
The arm that is up is the left arm. Taking it up is to let the other drivers know that they are about to make a turn to the left.
Read more on road signals here:
brainly.com/question/4533625
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Answer:
D.The United States is the answer
