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4 years ago

HELP ASAP MARKING AS BRAINLIST!! (ACE,GENIUS ONLY)

Mathematics

1 answer:

poizon [28]4 years ago

4 0

Answer:

x = 4.5

Step-by-step explanation:

The proportion is 8/9 for the lines. Divide 4 by 8/9 to find the value of x.

4/(8/9) = 4.5

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A powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. A group of 50 men (grou

Marta_Voda [28]

Answer:

$z=\frac{0.22-0.475}{\sqrt{0.333(1-0.333)(\frac{1}{50}+\frac{1}{40})}}=-2.549$

Step-by-step explanation:

Data given and notation

$X_{1}=11$ represent the number of men who believe that sexual discrimination is a problem

$X_{2}=19$ represent the number of women who believe that sexual discrimination is a problem

$n_{1}=50$ sample 1 selected

$n_{2}=40$ sample 2 selected

$p_{1}=\frac{11}{50}=0.22$ represent the proportion estimated of men who believe that sexual discrimination is a problem

$p_{2}=\frac{19}{40}=0.475$ represent the proportion estimated of female who believe that sexual discrimination is a problem

$\hat p$ represent the pooled estimate of p

z would represent the statistic (variable of interest)

$p_v$ represent the value for the test (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to check if is there is a difference between the two proportions, the system of hypothesis would be:

Null hypothesis: $p_{1} = p_{2}$

Alternative hypothesis: $p_{1} \neq p_{2}$

We need to apply a z test to compare proportions, and the statistic is given by:

$z=\frac{p_{1}-p_{2}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{1}}+\frac{1}{n_{2}})}}$ (1)

Where $\hat p=\frac{X_{1}+X_{2}}{n_{1}+n_{2}}=\frac{11+19}{50+40}=0.333$

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

3) Calculate the statistic

Replacing in formula (1) the values obtained we got this:

$z=\frac{0.22-0.475}{\sqrt{0.333(1-0.333)(\frac{1}{50}+\frac{1}{40})}}=-2.549$

8 0

4 years ago

Given a mean of 24.5 and a standard deviation of 1.7 what is the z score of the value 24 rounded to the nearest tenth?

Softa [21]

The correct answer is B) -0.3

Z-scores are found using the formula

z = (X-μ)/σ

For this problem, we have

z = (24-24.5)/1.7 = -0.5/1.7 = -0.3

3 0

4 years ago

A can of juice is 6 inches high, and its base has a diameter

xenn [34]

Answer:

24 pie, or, 75.36 inches cubed

Step-by-step explanation:

The formula for volume of a cylinder is pie*radius^2*height

The radius is half the diameter, so the radius is 2 inches.

Plug in given information into the formula and solve.

4 0

3 years ago

Write the following as an algebraic expression. Then simplify.

ch4aika [34]

X+(x+1)=y. The first integer would be x, and the second would be one more than x, so x+1. I'm not sure if there's a specific number they are supposed to total, so I just set it equal to y. If there is a specific number, just replace y with that number. Hope this helps!

8 0

4 years ago

Please help ill give brainliest

Nikolay [14]

Answer:

-1

Step-by-step explanation:

its -1 because negative * negative is positive. so make the -10 a 10 and subtract 3 and boom you have 7.

Hope this helps ya

7 0

3 years ago

Read 2 more answers