Mathematics, 29.06.2021 22:20 timithythaxton
A student researcher conducts an experiment that investigates the effects of
a new textbook on student achievement. Two intact classrooms are used for
the samples. One classroom is taught with the new textbook and the other is
taught with the traditional textbook. Each sample consists of 30 students.
Observations of student engagement are rated by the researcher, according
to an engagement scale. How could this study be improved?
Select all that apply.
A. Randomly assign students to two different groups.
B. Administer an instrument, gauging student understanding.
O C. Restrict the study to one group - the one taught with the new
textbook.
D. Have another researcher rate the observations, as well.
SUBMIT
Answers: 1
Mathematics, 21.06.2019 19:40, marshallmattah
Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297
Answers: 1
Mathematics, 21.06.2019 21:30, natalieburnett82
Ihave a triangle with a 60 degree angle. lets use d for that angle. what are the values of e and f if d is 60 degrees? and what do you notice about the values of e and f?
Answers: 2
Mathematics, 21.06.2019 21:30, jarviantemelton
Consider the following equation. 1/2x^3+x-7=-3sqrtx-1 approximate the solution to the equation using three iterations of successive approximation. use the graph below as a starting point. a. b. c. d.
Answers: 3
A student researcher conducts an experiment that investigates the effects of
a new textbook on stud...
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