Mathematics, 28.01.2020 19:41 sierrac2651
Within a school district, students were randomly assigned to one of two math teachers - mrs. smith and mrs. jones. after the assignment, mrs. smith had 30 students, and mrs. jones had 25 students. at the end of the year, each class took the same standardized test. mrs. smith's students had an average test score of 78, with a standard deviation of 10; and mrs. jones' students had an average test score of 85, with a standard deviation of 15.
test the hypothesis that mrs. smith and mrs. jones are equally effective teachers. use a 0.10 level of significance. (assume that student performance is approximately normal.)
Answers: 2
Mathematics, 21.06.2019 19:10
The linear combination method is applied to a system of equations as shown. 4(.25x + .5y = 3.75) → x + 2y = 15 (4x – 8y = 12) → x – 2y = 3 2x = 18 what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)
Answers: 1
Mathematics, 21.06.2019 19:10
What is the quotient? x+5/ 3x²+4x+5 © 3x2 – 11 + x + s 3x – 11 + 60 x + 5 o 3x2 - 11 - 50 x + 5 3x – 11 - - x + 5
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Mathematics, 22.06.2019 01:30
The unpaid balance on a mastercard charge was $1,056.23. during the month, payments of $300 and $250 were made and charges of $425 and $274.16 were added. if the finance charge is 1.2% per month on the unpaid balance, find the new balance at the end of the month. $1,205.39 $1,218.06 $918.06 $1,768.06
Answers: 2
Within a school district, students were randomly assigned to one of two math teachers - mrs. smith a...
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