2 years ago

I NEED HELP ASAP please please hurry up!!

Mathematics

1 answer:

prohojiy [21]2 years ago

4 0

Answer:

first one is 0.02 the second is 8

Step-by-step explanation:

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The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

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3 years ago

$3 is what percent of $4?

ozzi

Answer:

The answer is 3/4 = 75%

Step-by-step explanation:

3/4 = 75%

It is: 3/4 = 75%

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3 years ago

The figure below shows a shaded rectangle inside a large rectangle:

trasher [3.6K]

Answer:

46% i hope this helps

Step-by-step explanation:

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2 years ago

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I'm pretty sure the answer is pi/2. Just plugged it in my calculator and it said error.

Yes it's A and B

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