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Bas_tet [7]
3 years ago
9

If someone is good at trigonometry, I will literally cash app you money to help me with answers on my quiz!!!

Mathematics
1 answer:
krek1111 [17]3 years ago
8 0

Answer:

what p-by-step explanation:

Ok do you need help with

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Is the confidence interval affected by the fact that the data appear to be from a population that is not normally​ distributed?
sp2606 [1]

Answer:

D. No, because the sample size is large enough.

Step-by-step explanation:

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

If the sample size is higher than 30, on this case the answer would be:

D. No, because the sample size is large enough.

And the reason is given by The Central Limit Theorem since states if the individual distribution is normal then the sampling distribution for the sample mean is also normal.

From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

If the sample size it's not large enough n<30, on that case the distribution would be not normal.

7 0
3 years ago
If the rate of inflation is 3.4%per year, the future price pt(in dollars) of a certain item can be modeled by the following expo
Doss [256]

Answer:

The current price is $3000 and price after 9 years from today is $4054.

Step-by-step explanation:

The future price pt(in dollars) of a certain item can be modeled by the following exponential function

p(t)=3000(1.034)^t

where, t is the number of years from today.

Substitute t=0 to find the current price.

p(0)=3000(1.034)^0=3000

Therefore the current price is $3000.

Substitute t=9 to find the price after 9 years from today.

p(9)=3000(1.034)^9

p(9)=3000(1.35109177087)

p(9)=4053.27531261

p(9)\approx 4054

Therefore the price after 9 years from today is $4054.

4 0
3 years ago
Which equation(s) represents a proportional relationship? A) y = 5+x B) y = 4x C) y = 7x? D) y = 2-x
andreyandreev [35.5K]

Answer:

B & C

Step-by-step explanation:

A proportional relationship has a proportionality constant (constant rate of change) and and must cross through the origin (or begin at (0,0). This means it's y-intercept is 0. Each of the options is a linear function. All of the functions have a constant rate of change. Only one as b=0 or 0 as the y-intercept.

B) y=4x has a constant of 4 and passes through the origin.

C) y=7x has a constant of 7 and passes through the origin.


6 0
3 years ago
*<br> Write the equation in standard form using integers.<br><br> y=-4/5x+3
svetoff [14.1K]

Answer:

4x + 5 y = 15

Step-by-step explanation:

6 0
2 years ago
Whats is the anwser to 469 plus 8346
NeX [460]
469 + 8346 = 8,815...is that what you needed to know?
3 0
2 years ago
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