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3 years ago

10

HELP PLEASE BRAINLEST FOR ANSWER Which sample is biased?

2 answers:

Andreyy893 years ago

7 0

C is in a good way to get your info from your email message to you as soon as I receive your message I thank you for the info I appreciate it thanks so much for sharing my prayers and prayers thank for all the hope you for your day thank you so much for your patience I keep you in the loop

Ivenika [448]3 years ago

3 0

Answer:

I think A and B are biased and C and D aren't.

Step-by-step explanation:

A and B are surveying a certain amount of people while C and D are surveying people at random

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sashaice [31]

You use rise over run

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3 years ago

Given that these simultaneous equations

Tatiana [17]

The value of k is $(3\sqrt{ 10})/2$

<h3>How to solve the simultaneous equation?</h3>

Given:

x-y=k.............(eq i)

2x²+y²-15..............(eq ii)

We would make y the subject formula in eq ii

2x²+y²-15= 0

2x² + y²= 15

y²= 15-2x²

y= $\sqrt{15-2x^2}$ ...........(eq iii)

Substitute the value of y into eq i

x-( $\sqrt{15-2x^2}$ = k

x- ( $\sqrt{15} - 2x$ = k

k= $(3\sqrt{ 10})/2$

Read more about simultaneous equations here:

brainly.com/question/16863577

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2 years ago

What is 0.8% of 50?<br> A. 0.04<br> B. 0.4<br> C. 4<br> D. 40

BaLLatris [955]

Answer:

It would be A!

Step-by-step explanation:

.08 times .50 would be 0.04. (It's a quick way to be able to solve problems similar to that! :)

7 0

3 years ago

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The heights of women aged 20 to 29 are approximately normal with mean 64 inches and standard deviation 2.7 inches. Men the same

san4es73 [151]

Answer:

Step-by-step explanation:

$Z=\frac{x-mu}{\sigma }$

X - Heights of women aged 20 to 29: X is N(64, 2.7)

Y - Heights of men aged 20 to 29: X is N(69.3, 2.8)

a) X=6'=72"

Z= $\frac{72-64}{2.7} =2.963$

b) Y = 72"

z= $\frac{72-69.3}{2.8} =0.965$

c) 72' women can be taken as very tall but men moderately taller than average

d) Y<5'5" =65"

Z< $\frac{65-69.3}{2.8} =-1.536$

e) X>73"

Z> $\frac{73-64}{2.7} =3.33$

Almost 0% can be taken

f) IQR =Q3-Q1

Z scores =

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3 years ago

What is the product? x^2-16/2x+8 times x^3-2x^2+x/x^2+3x-4

tankabanditka [31]

Answer:

v

x

5

−

2

v

x

4

−

8

x

4

+

3

v

x

3

+

24

x

3

−

4

v

x

2

−

40

x

2

+

v

x

+

56

x

+

8

x

−

40

v

x

5

-

2

v

x

4

-

8

x

4

+

3

v

x

3

+

24

x

3

-

4

v

x

2

-

40

x

2

+

v

x

+

56

x

+

8

x

-

40

Step-by-step explanation:

8 0

3 years ago

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