Using the z-distribution, it is found that the value of the test statistic is z = 10.33.
At the null hypothesis, it is <u>tested if the proportion</u> is of , hence:
At the alternative hypothesis, it is <u>tested if the proportion is different</u>, that is:
The test statistic is given by:
In which:
- is the sample proportion.
- p is the proportion tested at the null hypothesis.
For this problem, the parameters are:
Hence:
A similar problem is given at brainly.com/question/24330815
Answer:
Step-by-step explanation:
Xét tam giác AHC và tam giác BAC có
góc AHC = góc BAC =90°
Góc C chung
Suy ra tam giác AHC đồng dạng với tam giác BAC
Suy ra AH×BC=AB×AC
Suy ra h.a=b.c
Suy ra h^2.a^2=b^2.c^2
Suy ra h^2.(b^2+ c^2 )=b^2.c^2
( áp dụng định lí pytago vào tam giác ABC)
Suy ra 1/h^2=c^2+ b^2/b^2.c^2
Suy ra 1/h^2=1/b^2+1/c^2
2(6x+20) +2(8x-16)=180
12x+16x+40-32=180
28x+8=180
X=180-8/28=6
I think so my calculation may be wrong )
Answer: x=3+2y
Step-by-step explanation:
2x-4y=6
x=3+2y
3+2y-2y=3
x=3+2y
Answer:
For upper bound, the length is 88.5 cm and width is 49.5 cm
For lower bound, the length is 87.5 cm and width is 48.5 cm