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Korvikt [17]
3 years ago
9

Please help i really need help on this assignment and i will give brainliest

Mathematics
2 answers:
Ksenya-84 [330]3 years ago
8 0

Answer:

i think it is the 3rd one?

Step-by-step explanation:

saveliy_v [14]3 years ago
7 0

Answer:

Function 2 has greater slope and lesser y-intercept than Function 1.

Step-by-step explanation:

Function 1's y-intercept is 2, because when x=0, y=2 in the equation itself. Function 2's intercept on the graph is a negative number, so its automatically lesser than function 1.

The slope for function 1 is 1/3, while the slope for function 2 is 1/2, which is greater than 1/3 as you can find from the x-coordinates (3,0) and (5,1).

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Researchers conducted a study to find out if there is a difference in the use of ereaders by different age groups. randomly sele
ikadub [295]

No, there is significant difference in the use of e readers by different age groups.

Given sample 1 ( 29 years old) n_{1}=628, p_{1}=7%, sample 2( 30 years old)n_{2}=2309, p_{2}=0.11.

We have to first form hypothesis one null hypothesis and other alternate hypothesis.

H_{0}:π1-π2=0

H_{1}:π1-π2≠0

α=0.05

Difference between proportions p_{1}-p_{2}  =-0.04

p_{d}=0.07-0.11=-0.04

The pooled proportion needed to calculate standard error is:

p=(X_{1} -X_{2} )/(n_{1} +n_{2} )

=(44+254)/(628+2309)

=0.10146

The estimated standard error of difference between means is computed using the formula:

S_{p_{1} -p_{2} }=\sqrt{p(1-p)/m_{1}+p(1-p)/n_{2}  }

=\sqrt{0.101*0.899/628+0.101*0.899/2309}

=\sqrt{0.000143+0.00003}

=\sqrt{0.000173}

=0.01315

Z= Pd-(π1-π2)/S_{p_{1} -p_{2} }

=-0.04-0/0.013

=-3.0769

This test is a two tailed test so the p value for this test is calculated as (using z table)

p value:2 P(Z<-3.0769)

=2*0.002092

=0.004189

P value< significance level of 5%.

Hence there is enough evidence to show the claim that there is a significant difference in the use of e readers by different age groups.

Learn more about hypothesis at brainly.com/question/11555274

#SPJ4

Question is incomplete as it also includes:

Significance level of 5%.

4 0
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You use additive inverse to combine like terms that are on opposite sides of the equation. 
ie.
3x + 1 = 6x -12 
You use additive inverse to move -12 to the +1
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Step-by-step explanation:

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