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Elena L [17]
3 years ago
15

If the population standard deviation is 10 , how large a sample is necessary to have a standard error that is

Mathematics
1 answer:
liraira [26]3 years ago
5 0
The standard error given a population standard deviation of \sigma is \dfrac\sigma{\sqrt n}. So if the desired standard error is s, then

s=\dfrac\sigma{\sqrt n}\implies \sqrt n=\dfrac\sigma s\imlies n=\dfrac{\sigma^2}{s^2}
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What percentage of a dollar is the value of each coin combination?
Brut [27]

Answer:

Step-by-step explanatinon:

percent is per hundred

4 dimes is  40 cents or $0.40 or 40/100 of a dollar which is40%

1 nickel and 3 pennies or 8 cents or $0.08 Or 8/100 or 8%

5 quarters and one dime is 135/100 or  $1.35 or 135/100 which is 135%

5 0
3 years ago
The following diagram shows parallel lines cut be a transversal. What is the measure of Angle 2?
Crank
2x + 100 = 5x + 55
3x = 45
x = 15

2(15) + 100 = 130

180-130 = 50

so angle 2 is 50 degrees

3 0
3 years ago
Find the volume of the prism.<br> 3 ft<br> 7 ft<br> 5 ft
Taya2010 [7]

Answer:

105

Step-by-step explanation:

I am guess this prism is a rectangle

So 3 times 7 times 5 is 105

Thus the answer is 105

Hope this helps!

6 0
2 years ago
Read 2 more answers
the first side of a triangle measures 4 in. less than the second side, the third side is 3 in. more than the first side, and the
Shtirlitz [24]
Start by representing the lengths of the three sides of your triangle:

first side:  x-4 (inches)
second side:  x (inches)
third side:  (x-4) + 3 (inches)

Add these three quantities up to obtain a formula for the perimeter, and set your sum equal to the given perimeter (15 inches):

x-4  +  x  +  x-4  -3  =  15

3x-11=15
3x=26
x=26/3

Thus, the length of the 2nd side is 26/3; that of the first side is 26/3-4, or 14/3; and that of the third side is 14/3+3, or 23/3 (all measurements in inches).


3 0
3 years ago
Read 2 more answers
Please solve this :)​
Anastasy [175]

Answer:

=25+2squared

Step-by-step explanation:

simple like terms

36-11=25

-5squared+7squared=2squared

=25+2squared

3 0
3 years ago
Read 2 more answers
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