Mathematics, 09.06.2020 18:57 kianakilbourn8
The effect of the time of day a psychology class is taught on test scores is being studied in an experiment. The difficulty of test questions has been identified as an extraneous factor that could also affect test scores. How can the difficulty of test questions best be addressed to minimize its effect in the experiment?
A.
Direct control by requiring every class to take the same test
B.
Blocking into groups based on the teacher of the class
C.
Replication of the experiment at different times of the year
D.
Randomization of students in morning and afternoon classes
Answers: 1
Mathematics, 21.06.2019 22:00
Given that sinβ
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< Ο/2, what is the exact value of cosβ
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Mathematics, 21.06.2019 23:00
Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2β3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.
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Mathematics, 22.06.2019 00:30
An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.
Answers: 1
Mathematics, 22.06.2019 00:30
Which number can each term of the equation be multiplied by to eliminate the decimals before solving? 5.6j- 0.12=4+1.1j
Answers: 3
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