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mezya [45]
2 years ago
13

URGENT I WILL MARK BRAINLIEST Pick the right answers

Mathematics
1 answer:
Nataly [62]2 years ago
3 0

Answer:

A.

Step-by-step explanation:

I think it is A if not  dm me and i will give another answer

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5. Kal Tire installs automobile tires on a first-come first-served basis. A random sample of 50 customers experienced an average
Rainbow [258]

5.7099 is the margin of error.

<h3>What is standard deviation ?</h3>

A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean.

Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.

According to the question,

The standard sampling error of the sample mean is σₓ ,

The sampling distribution is: N (u,σₓ/n)

Therefore,

By using the standard deviation formula:

σₓ = √∑(xi -μ)/N

Where,

∑= population standard deviation

N= the size of the population

xi= each value from the population

μ =the population mean

So ,

σₓ = \frac{20.6}{\sqrt{50} } = 2.913

Since, a = 1- 95% = 0.05

therefore Z\frac{a}{2} = (1-0.005 x 2) = 1.959964

Here, the margin of error for a 95% confidence interval for this sample is given by:

Z\frac{a}{2} * σₓ = 1.959964 x 2.913    

           = 5.7099

5.7099 is the margin of error for a 95% confidence interval for this sample.

Learn more about standard deviation here:

brainly.com/question/13905583

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7 0
1 year ago
PLEASE HELP ME ASAP!!!
Anuta_ua [19.1K]

Answer:

\

\

  \

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is around about the line

6 0
3 years ago
Without dividing, determine the sign of the quotient:
amm1812

Answer:

Option A

Step-by-step explanation:

If you divide a negative number by a negative number, the answer will always be positive, so A must be the right answer  

6 0
3 years ago
Plz help will mark brainliest..
egoroff_w [7]
The best answer would be 2 feet hope this helps!
6 0
3 years ago
Read 2 more answers
Find derivative: f(u) = arctan(u/(1+u)
VikaD [51]
F ` ( x ) = 
\frac{1}{1+ \frac{u ^{2} }{(1+u) ^{2} } } * ( \frac{u}{1+u})`= \\ = \frac{1}{ \frac{(1+u) ^{2}+ u^{2}  }{(1+u) ^{2} } }  *  \frac{(u)`(1+u)-(1+u)` u}{(1+u) ^{2} } = \\ = \frac{(1+u) ^{2} }{(1+u) ^{2}+u ^{2}  } * \frac{1+u-u}{(1+u) ^{2} } = \\ = \frac{1}{1+2u+2u ^{2} }
6 0
3 years ago
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