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8090 [49]
2 years ago
11

Suppose that a population parameter is 0.3 and many samples are taken from the population. If the size of each sample is 40, wha

t is the standard error of the distribution of sample proportions?
A. 0.095
B. 0.055
C. 0.072
D. 0.032
Mathematics
1 answer:
scoundrel [369]2 years ago
7 0

Answer:

0.072

Step-by-step explanation:

A P E X

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The height of a wooden pole, h, is equal to 20 feet. A taut wire is stretched from a point on the ground to the top of the pole.
kykrilka [37]

ANSWER

D. 25 feet

EXPLANATION

The height of the wall,h, the taut wire and the distance from the base of the pole to the point on the ground, formed a right triangle.

According to the Pythagoras Theorem, the sum of the length of the squares of the two shorter legs equals the square of the hypotenuse.

Let the hypotenuse ( the length of the ) taught wire be,l.

Then

{l}^{2}  =  {h}^{2}  +  {b}^{2}

{l}^{2}  =  {20}^{2}  +  {15}^{2}

{l}^{2}  =  400 + 225

{l}^{2}  =  625

l=  \sqrt{625}  = 25ft

8 0
3 years ago
The price of a gallon went from $0.64 to $0.68 per gallon. What was the percent of increase in the price of a gallon?
Paraphin [41]

Answer:

0.20%

Step-by-step explanation:

I think, I'm not sure on

7 0
3 years ago
Read 2 more answers
Which geographic feature was common to the development of civilizations in ancient Egypt, China, India, and Mesopotamia?
storchak [24]
The answer is probably D 
5 0
3 years ago
The wavelength of green lights is about 0.00000051 meter. What is the estimated wavelength as a single digit times a power of 10
kari74 [83]

<em><u>Answer:</u></em>

<h2>5.1 X 10^-7</h2>

<u><em>Reason:</em></u>

It is to the -7 because you would have to move the decimal left (-) 7 times to get the original 0.00000051.

Hope this helps! ;)

6 0
3 years ago
Help! Please. I don’t know what to do. I got this wrong. Thanks.
strojnjashka [21]

Answer: I believe the answer would be 1/9 ?

7 0
3 years ago
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