Answer:
2 proportions z test
The two populations are named as residents from the first county and residents from the second county.
Step-by-step explanation:
This is testing hypothesis about the difference between two proportions.
When the proportions are tested if they are the test statistic
z= ( p^1-p^2)- (p1-p2) / √p₁q₁/n₁ + p₂q₂/ n₂
where p^1 is the proportion of success in the first sample and p^2 of size n₁ is the proportion of success in the second sample of size n₂ with unknown proportions of successes p1 and p2 respectively.
When the sample sizes are sufficiently large
z= ( p^1-p^2)- (p1-p2) / √p₁q₁/n₁ + p₂q₂/ n₂ is approximately standard normal.
The two populations are named as residents from the first county and residents from the second county.
is
, multiple by the reciprocal of the second fraction to get the answer.
Six multiplied by three equals eighteen. fifteen plus three equals eighteen. and eighteen equals eighteen. therefore the equation is equal, because everything in the equation equals eighteen. Good Luck ;)
La respuesta correcta es
579
597
759
795
957
975
555
557
575
559
595
777
775
757
779
797
999
995
959
997
979
577
599
755
799
955
977
2x+3y=5
-3x+2y=-14
3( 2x+3y=5)
2 (-3x+2y=-14)
--------------------
13y=-13 ⇒y=-13/13=-1
2( 2x+3y=5)
-3(-3x+2y=-14)
---------------------
13x = 52 ⇒x=52/13=4
Answer: x=4; y=-1
To check:
2x+3y=5
2*4+3*(-1)=8-3=5
-3x+2y=-14
-3*4+2*-1=-12-2=-14