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Fed [463]
4 years ago
15

I need help with #4 plzz

Mathematics
2 answers:
stich3 [128]4 years ago
8 0
Heart damage. Hope it's correct (:
Naya [18.7K]4 years ago
6 0
Heart damage. Hope this helped!
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Starting salaries of 90 college graduates who have taken a statistics course have a mean of $43,993 and a standard deviation of
inysia [295]

Answer:

a) E = 2482.90

b) 99% Confidence interval: (41510.1,46475.9)

Step-by-step explanation:

We are given the following in the question:

Sample mean, \bar{x} =$43,993

Sample size, n = 90

Alpha, α = 0.051

Sample standard deviation, s = $9,144

a) The margin of error

Formula:

z_{critical}\text{ at}~\alpha_{0.01} = 2.576

E =z_{critical}\times \displaystyle\frac{s}{\sqrt{n}}\\\\E = 2.576\times \frac{9144}{\sqrt{90}}\\\\E = 2482.90

b) 99% Confidence interval:  

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

43993 \pm 2482.90 = (41510.1,46475.9)

3 0
3 years ago
Evaluate the expression 2x - 5 when x = -5 <br> C) 5<br> D) 15<br> A)-5<br> B) -15
IRINA_888 [86]

Answer:

B) -15

Step-by-step explanation:

8 0
3 years ago
-15g^2 is this monomial and please explain this as dummed down as possible
quester [9]
Yes, that is a monomial

A monomial is basically a "set" of numbers being multiplied or diveded

It is an expression with one term

For example, in 3x^2+5b,  3x^2 is a monomial and 5b is a monomial and together they make a binomial 



4 0
3 years ago
Read 2 more answers
Why is implicit differentiation necessary in order to find derivatives of curves which do not represent functions?
Ahat [919]

The answer is implicit

6 0
4 years ago
Read 2 more answers
So what is 3.30 - 3.09 - 2.98
aalyn [17]

Answer:

-2.77 is the correct answer (doing this to get to 20 characters lol)

6 0
3 years ago
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