Mathematics, 02.03.2020 19:30 AADJ4
In order to estimate the difference between the average hourly wages of employees of two branches of a department store, two independent random samples were selected and the following statistics were calculated. Downtown Store - North Mall Store Sample size: 25 - 20 Sample mean: $9 - $8 Sample standard deviation: $2 - $1A 95% interval estimate for the difference between the two population means is
a. 1.09 to 4.08
b. 0.07 to 1.9
c. 1.08 to 2.92
d. 1.9 to 2.08
Answers: 2
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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)
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