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trapecia [35]
3 years ago
11

What is the standard deviation of the following data set rounded to the nearest tenth?

Mathematics
2 answers:
Lemur [1.5K]3 years ago
8 0

Answer:

B (229.1)  :D

Step-by-step explanation:

Georgia [21]3 years ago
5 0
  <span>Note that the mean (78 +90 +456 +676 + 111+ 381+ 21)/7 = 259 
The differences (in absolute value - we're going to square later so it doesn't matter) between each piece of data and the mean are 
181, 169, 197, 417, 148, 122, 238 
Square each of these and add the results together to obtain 367452 
Now your question depends on whether you want the sample standard deviation or population standard deviation - which you have not specified. In the first case divide by 6. In the second case divide by 7. We get roughly 61242 or 52493. The square root of each yields 247.47 or 229.11 depending on whether you want the sample sd or pop sd. The 4 choices imply you are looking for the latter, so the answer is A.i think</span>
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All equilateral triangles are also isosceles triangles.
Tpy6a [65]

Answer:

True

Step-by-step explanation:

Isosceles triangles are a subset of equilateral triangles

Equilateral have all three sides the same while isosceles have at least 2 sides the same

Equilateral have all three angles equal while isosceles have at least 2 angles equal

8 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=I%20%3D%20%5Cfrac%7BE%7D%7B%20%5Csqrt%7BR%20%7B%7D%5E%7B2%7D%20%2B%20W%20%7B%7D%5E%7B2%7D%20L%
AleksandrR [38]

Answer:

R = sqrt[(IWL)^2/(E^2 - I^2)] or R = -sqrt[(IWL)^2/(E^2 - I^2)]

Step-by-step explanation:

Squaring both sides of equation:

     I^2 = (ER)^2/(R^2 + (WL)^2)

<=>(ER)^2 = (I^2)*(R^2 + (WL)^2)

<=>(ER)^2 - (IR)^2 = (IWL)^2

<=> R^2(E^2 - I^2) = (IWL)^2

<=> R^2 = (IWL)^2/(E^2 - I^2)

<=> R = sqrt[(IWL)^2/(E^2 - I^2)] or R = -sqrt[(IWL)^2/(E^2 - I^2)]

Hope this helps!

7 0
3 years ago
5( x + 9)<br> What is the answer to that
emmasim [6.3K]

Answer:

5x + 45

Step-by-step explanation:

distribute 5 to both x and 9 so multiply them both

7 0
2 years ago
Read 2 more answers
If X and Y vary directly, as x decreases, what happens to the value of y?
diamong [38]
As x decreases y also decreased
5 0
3 years ago
What multiplies to 378 and adds to -51
Oliga [24]
Your answer would be -9 & -42. 

Here's why ...
(-9)*(-42) A negative times a negative equals a positive (378).
Now, -9-42=-51 & you add these because you have two negatives.

Hope this makes sense & helps you ! (:


6 0
3 years ago
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