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FrozenT [24]
3 years ago
5

The following graph shows a proportional relationship.

Mathematics
1 answer:
otez555 [7]3 years ago
3 0

Answer:

Step-by-step explanation:

1/5

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A manager at a local company asked his employees how many times they had given blood in the last year. The results of the survey
Lubov Fominskaja [6]

Answer:

Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54

Step-by-step explanation:

For this case we have the following distribution given:

X        0         1       2       3       4         5        6

P(X)  0.3   0.25   0.2   0.12   0.07   0.04   0.02

For this case we need to find first the expected value given by:

E(X) = \sum_{i=1}^n X_i P(X_I)

And replacing we got:

E(X)= 0*0.3 +1*0.25 +2*0.2 +3*0.12 +4*0.07+ 5*0.04 +6*0.02=1.61

Now we can find the second moment given by:

E(X^2) =\sum_{i=1}^n X^2_i P(X_i)

And replacing we got:

E(X^2)= 0^2*0.3 +1^2*0.25 +2^2*0.2 +3^2*0.12 +4^2*0.07+ 5^2*0.04 +6^2*0.02=4.97

And the variance would be given by:

Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779

And the deviation would be:

Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54

 

8 0
3 years ago
Can someone explain how to do this? I don't get it.
mihalych1998 [28]

Answer: I think 91.9

Step-by-step explanation:

If I remember right, all the angles of a triangle add up to 180 degrees. So taking 22.8 + 65.3 = 88.1, then 180 - 88.1 = 91.9

Sorry if that’s not right! I just wanted to take a crack at it.

4 0
3 years ago
Read 2 more answers
How much is 5/6 times 2 3/4
Anit [1.1K]
5/6 x 2 3/4 = 5/6 x (2x4+3)/4 = 5/6 x 11/4 = 55/24 = 2 7/24
6 0
3 years ago
Read 2 more answers
HELP DUE TONIGHT!!!<br> What is 3% of 90???
natali 33 [55]

Answer:

2.7

Step-by-step explanation:

3% × 90 =

(3 ÷ 100) × 90 =

(3 × 90) ÷ 100 =

270 ÷ 100 =  2.7

8 0
3 years ago
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What is the cube root of b^27
koban [17]
9 the answer is 9 to find cube root just divide by 3

4 0
3 years ago
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