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otez555 [7]
3 years ago
15

Although, in general, you cannot know the sampling distribution of the sample mean exactly, by what distribution can you often a

pproximate it? ?
(A) Reverse J-shaped
(B) Normal
(C) J-shaped
(D) Uniform
Mathematics
1 answer:
Vitek1552 [10]3 years ago
4 0

Answer:

b: Normal Distribution

Step-by-step explanation:

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Brian answered 35 questions, or 70%, correctly on a test. James answered 90% of the questions correctly.
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He answered 50 questions
3 0
3 years ago
Solve the simultaneous equations by substitution<br> 4x+3y=-2<br> 3y=4-x
stiv31 [10]

Answer: x=-2 y=2

Step-by-step explanation:

I decided that isolating the y value of the second equation is the best way to start solving.

I divide 3 from both sides to get y= (4-x)/3. With this, I can substitute into the first equation. 4x+3(4-x)/3)=-2.

The multiplying the 3 by the denominator three cancels each other out to make:

4x+4-x=-2.

We subtract 4 on both sides and then subtract x from 4x.

We end up with 3x=-6. Then, we divide both sides by 3.

x=-2.

Now we substitute this into the second equation to solve.

3y=4-(-2)

This becomes 3y=4+2 which is 3y=6

We divide both sides by 3 to get y=2

We end up with x=-2 and y=2.

I hope you learned something :)

4 0
3 years ago
Read 2 more answers
The graphs of f(x)=-2x and g(x)=(1/2)^x are shown. what are the solutions to thr equation -2x=(1/2)^x? select each correct answe
sineoko [7]

Answer:

<h2>-2</h2>

Step-by-step explanation:

hello :

f(x)=-2x and g(x)=(1/2)^x

f(-2)=-2(-2) =4

g(-2)=(1/2)^-2 = 1/2^-2 = 2²=4

4 0
3 years ago
Two skateboarders start a race at the same time. Skateboarder A travels at a steady rate of 15 feet per second. Skateboarder B t
notsponge [240]
So covert 4 minutes to seconds. Which would be 4 times 60 which would mean there would be 240 seconds. So you would multiply 15 x 240 = 3,600 feet. Then multiply 22 x 240 = 5,280 feet. 5,280 - 3,600 = 1,680 feet.

ANSWER:
Skateboarder B will have traveled 1,680 more feet over 4 minutes.
5 0
3 years ago
-6 + 3a - b - 4a + 4b + 5
Naddika [18.5K]

Step-by-step explanation:

hope this may help you tq have a nice day

5 0
3 years ago
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