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I am Lyosha [343]
3 years ago
10

Which statements are true?

Mathematics
1 answer:
iVinArrow [24]3 years ago
8 0

Answer:

this made no sense at first but the answer is b

Step-by-step explanation:

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The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 256.3 and a standard deviation of
AnnyKZ [126]

Answer:

a) In the interval  (  55,9  ;   456,7 ) we will find 99,7 % of all values

b) In the interval  (  122,7  ;  389,9 ) we find 95,4 % of all values

Step-by-step explanation:

For a Normal distribution N (μ ; σ ) the Empirical rule establishes that the intervals:

( μ  ±  σ  )          contains 68,3 % of all values

( μ  ±  2σ  )        contains 95,4 % of all values

( μ  ±  3σ  )        contains 99,7 % of all values

If   N ( 256,3 ; 66,8 )

σ  =  66,8        ⇒   3*σ  = 3 * 66,8  = 200,4

Then:     256,3 - 200,4  =  55,9

And        256,3 + 200,4 = 456,7

a) In the interval  (  55,9  ;   456,7 ) we will find 99,7 % of all values

b) 2*σ  = 2 * 66,8  = 133,6

Then  256,3 - 133,6  = 122,7

And    256,3 + 133,6 = 389,90

Then in the interval  (  122,7  ;  389,9 ) we find 95,4 % of all values

4 0
3 years ago
180−(68+a) simply the expression
Ivenika [448]

Answer: -a +112

Step-by-step explanation:

7 0
3 years ago
Elaine found the following in her pocket. How much money was in her pocket
jenyasd209 [6]

Answer:

we need the numbers... or like the coins, or something to solve it with. you need to include what was actually in here pocket lol

3 0
2 years ago
Pls HELP ive been trying to figure this out forever!!!
SOVA2 [1]

Answer:

I think is B .3 < x

hope it helps!

4 0
3 years ago
5(2x+7) HELP ASAP PLS​
Bingel [31]

Answer:

45x

Step-by-step explanation:

Plz mark brainliest

3 0
3 years ago
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