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 17:50
Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00
Answers: 1
Mathematics, 21.06.2019 21:30
One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?
Answers: 1
Mathematics, 21.06.2019 23:40
For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =
Answers: 2
Researchers from the educational testing service (ets) found that providing immediate feedback to st...
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