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Mandarinka [93]
3 years ago
7

The standard deviation of the distribution of sample means is​ _______.

Mathematics
1 answer:
luda_lava [24]3 years ago
6 0

Answer:

Standard error

Step-by-step explanation:

The standard deviation of the distribution of sample means is called the standard error of the means.

It is denoted by: \sigma_{\bar X}

The standard error is calculated using the formula: \sigma_{\bar X}=\frac{\sigma}{\sqrt{n} }

where n is the sample size and \sigma is the population standard deviation.

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sweet [91]
Divide the figure into 2 rectangles. One being 12in x 13in and one being 18in x 7in. Find the area of each rectangle.
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18in x 7in = 126in^2
Add the two areas.
156 + 126 = 282in^2

282in^2 is the answer so (C)
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3 years ago
Sam spent a total of $90 at the grocery store. of this amount, he spent $72 on fruit. What percentage of the total did he spend
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Answer:

80%!

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Determine 4th term in the geometric sequence whose first term is -2 and whose common ration is -5.
anygoal [31]

Answer:

a_{4} = 250

Step-by-step explanation:

To obtain any term in the geometric sequence multiply the previous term by the common ratio r

here r = - 5 and a_{1} = - 2, hence

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8 0
3 years ago
A 30 inch board is to be cut into three pieces? a 30 inch board is to be cut into three pieces so that the second piece is 4 tim
Ostrovityanka [42]
Total length of the board = 30 inch 

Length of,

-- First piece = x

-- Second piece = 4x

-- Third piece = 5x

5x + 4x + x = 30

10x = 30 

x = 3

Therefore, the lengths of:

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7 0
3 years ago
Sally found that out of 750 cans stamped in the ½ hour trial run, 150 were not stamped. About how many were not stamped in 3 hou
Vera_Pavlovna [14]

Answer:

<em>About 900 cans not stamped in 3 hours</em>

Step-by-step explanation:

<u>Proportions</u>

Sally found that 150 cans were not stamped in the 1/2 hour trial run.

Following the same proportion in time, we can say:

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300 cans not stamped in 1 hour. Multiplying by 3:

900 cans not stamped in 3 hours

About 900 cans not stamped in 3 hours

7 0
2 years ago
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