Mathematics, 17.01.2020 21:31 darkdestroyer0888
Researchers from the educational testing service (ets) found that providing immediate feedback to students answering openended questions can dramatically improve students’ future performance on exams (educational and psychological measurement, feb. 2010). the ets researchers used questions from the graduate record examination (gre) in the experiment. after obtaining feedback, students could revise their answers. consider one of these questions. initially, 50% of the students answered the question correctly. after providing immediate feedback to students who answered incorrectly, 70% answered correctly. consider a bank of 100 open-ended questions similar to those on the gre. a. in a random sample of 20 students, what is the probability that more than half initially answer the question correctly? b. refer to part a . after providing immediate feedback, what is the probability that more than half of the students answer the question correctly?
Answers: 2
Mathematics, 21.06.2019 20:00
Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?
Answers: 2
Mathematics, 21.06.2019 20:00
Find the slope of the line passing through a pair of points
Answers: 2
Mathematics, 22.06.2019 00:00
Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?
Answers: 2
Researchers from the educational testing service (ets) found that providing immediate feedback to st...
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