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Nat2105 [25]
3 years ago
11

What is 8.5+ 3.4 - 6.5 - (-1.6) = ?

Mathematics
2 answers:
kicyunya [14]3 years ago
7 0

Answer:

The answer is 3.8

borishaifa [10]3 years ago
7 0
8.5+ 3.4 - 6.5 - (-1.6) = 7
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For a population with µ = 80 and σ = 20, the Sampling distribution of the Mean, based on n = 16 will have an expected value of t
allsm [11]

Answer:

Will have an expected value of the mean = 80 and a standard error of the mean = 5

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

\mu = 80, \sigma = 20

n = 16

So the mean is 80 and the standard deviation is s = \frac{20}{\sqrt{16}} = 5

Will have an expected value of the mean = 80 and a standard error of the mean = 5

6 0
3 years ago
Sin(5x+15)=cos(4x−6)
Thepotemich [5.8K]

Answer:

Step-by-step explanation:

you know ; for all reals a ; cos(π/2 - a) = sin(a)

so : sin(5x+15) = cos(π/2-(5x+15) ) = cos(π/2-5x-15)

sin(5x+15)=cos(4x−6)  eqivaut : cos(π/2-5x-15) = cos(4x−6)

note : cos(a)=cos(b)  :  a= b +2kπ  or a= - b +2kπ ....k in Z

π/2-5x-15 = 4x−6 + 2kπ    or π/2-5x-15 = - (4x−6) + 2kπ....k in Z

continue calculate : x .......

8 0
3 years ago
Determine the 5th term of the sequence 1, 10, 100, ​
balu736 [363]
To determine the 5th term you need to find the 4th. This doesn’t work for all but for this one you just add a zero at the end. So the 4th term is 1,000 and that makes the 5th term 10,000
4 0
3 years ago
Read 2 more answers
An engine encounters a standard environment with a probability of 0.9, and a severe environment with a probability of 0.1. In a
kari74 [83]

Answer:

.077

.64935

Step-by-step explanation:

Let F= failure

let S= severe

we are given that

p(F|S')= .03

p(F|S)= .5

For the first question we are looking for f

we can solve for it by using the law of total probability

so in theory we want

F∩S+F∩S'

Using the conditional probability formula we can solve for the intersections

.03*.9+.5*.1= .077

2.

For this question we are looking for S|F

to solve this use bayes thereom

S|F=\frac{F|S*S}{F|S*S+F|N*N}=\frac{.5*.1}{.5*.1+.9*.03}=.649 (or 50/77)

8 0
3 years ago
What is the value of f(–1)?
Genrish500 [490]
I think the answer is -f, hope this helps!
7 0
3 years ago
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