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Kitty [74]
2 years ago
14

The sample mean foot length of a simple random sample of 25 third-graders is 22.5 cm. The standard error of the mean is 0.8 cm.

Which one of the following is a correct interpretation for the standard error of the mean? A.The typical distance between each individual foot length in the sample and the sample mean foot length is approximately 0.8 cm. B.The typical distance between one sample mean foot length and another sample mean foot length is 0.8 cm. C.The typical distance between each individual foot length in the population and the true mean foot length is approximately 0.8 cm. D.The typical distance between means of samples of size 25 and the population mean foot length is approximately 0.8 cm E.The typical distance between each individual foot length in the sample and the true mean foot length is approximately 0.8 cm.
Mathematics
1 answer:
aev [14]2 years ago
8 0

Answer:

Step-by-step explanation:

The standard error is used to determine the difference between the sample mean of the data and the true population mean.

Standard error = population standard deviation/square root of the number of samples

Given that the sample mean foot length of a simple random sample of 25 third-graders is 22.5 cm and the standard error of the mean is 0.8 cm, the correct interpretation for the standard error of the mean is

D. The typical distance between means of samples of size 25 and the population mean foot length is approximately 0.8 cm

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Tcecarenko [31]
340.8 cm^2.

72+72+72+62.4+62.4=340.8cm^2.
6 0
3 years ago
Pls help asapp picture attached
Olin [163]

Answer:

50

Step-by-step explanation:

Angle 1 is 110.

Angle 3 is 2x plus 10.

Angle 1 and 3 are vertically opposite angles.

And vertically opposite angles r equal.

Which means, angle 1=angle 3,and angle 2=angke 4.

Here we only Need angle 2 and 3.

Angke 2= angle 3.

Which is 2x plus 10=110.

Therefore 2x=110-10=100

Therefore x = 100÷2=50

There u have it ma'am.

3 0
3 years ago
Read 2 more answers
Need help asap thank you
Angelina_Jolie [31]

Answer:

D is 107 and E is 38

Step-by-step explanation:

20x+40=180

20x=140

X=140/20

x=7

M<A=5(7)+3

38

m<a=m<e

15(7)+2

107

m<b=m<d

5 0
3 years ago
Sushil rolls a fair dice 138 times. How many times would Sushil expect to roll an even number​
dmitriy555 [2]
Since the chance of getting an even number on every roll is 3/6 or 1/2
We have to multiply 1/2 by 138

The answer is 69.

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5 0
3 years ago
Which expression represents the number 4+−25−−−−√ rewritten in a+bi form?
mr_godi [17]

Answer:

Option A. 4+5i

Step-by-step explanation:

we know that

The form of (a + bi) is known as a complex number where a and b are real numbers and i is an imaginary number equivalent to the square root of negative 1

we have the number

4+\sqrt{-25}

Remember

i=\sqrt{-1}

substitute

4+\sqrt{-25}=4+\sqrt{(-1)(25)}=4+5\sqrt{(-1)}=4+5i

4 0
2 years ago
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