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777dan777 [17]
3 years ago
10

Use the distributive property to remove the parentheses.

Mathematics
1 answer:
Shalnov [3]3 years ago
5 0
Answer: 12x^6 - 18x^4
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The authors of a paper concluded that more boys than girls listen to music at high volumes. This conclusion was based on data fr
schepotkina [342]

Answer:

Since the calculated value of z= 2.82  does not lie in the critical region  the null hypothesis is accepted and it is concluded that the sample data support the authors' conclusion that the proportion of the country's boys who listen to music at high volume is greater than this proportion for the country's girls.

The value of p is 0 .00233. The result is significant at p < 0.10.

Step-by-step explanation:

1) Let the null and alternate hypothesis be

H0:  μboys − μgirls > 0

against the claim

Ha: μboys − μgirls ≤ 0

2) The significance level is set at 0.01

3) The critical region is z  ≤  ± 1.28

4) The test statistic

Z= p1-p2/ sqrt [pcqc( 1/n1+ 1/n2)]

Here p1= 397/768= 0.5169  and p2= 331/745=0.4429

pc = 397+331/768+745

pc= 0.4811

qc= 1-pc= 1-0.4811=0.5188

5) Calculations

Z= p1-p2/ sqrt [pcqc( 1/n1+ 1/n2)]

z= 0.5169-0.4429/√ 0.4811*0.5188( 1/768+  1/745)

z= 2.82

6) Conclusion

Since the calculated value of z= 2.82  does not lie in the critical region  the null hypothesis is accepted and it is concluded that the sample data support the authors' conclusion that the proportion of the country's boys who listen to music at high volume is greater than this proportion for the country's girls.

7)

The value of p is 0 .00233. The result is significant at p < 0.10.

8 0
2 years ago
Help please No links And with explanation please!
victus00 [196]
First: -8 second:17
4 0
3 years ago
Can somebody help me
Alex
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3 years ago
8 divide 2 equals n
GarryVolchara [31]

Answer:

Me no good at math :(

Step-by-step explanation:

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7 0
3 years ago
Read 2 more answers
Here is a data set:
Nina [5.8K]

Answer:

Stem and Leaf Plot:

Stem ----  Leaf

6 ----  0 3 5 7 7 8 9

7 ----  0 1 1 1 2 3 4 6 6 7 8 9

8 ----  0 1 3 7 9

9 ---- 3 4 8

10

11

12

13

14

15

16

17 ----  2

18

19

20

Step-by-step explanation:

I hope this helps...

6 0
3 years ago
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