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iragen [17]
2 years ago
11

NEED HELP ASAP MAKE SURE RIGHT ANSWER

Mathematics
2 answers:
Furkat [3]2 years ago
8 0

Answer:

The first one is 0.01667 and the second one is 0.37037

Step-by-step explanation:

ValentinkaMS [17]2 years ago
5 0

Answer:

The first one is 60

check : 0.15 x 60 = 9

the second one is 2.7

check: 24 x 2.7 = 64.8

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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
There are 7 days in 1 week. How many days are there<br> in 4 weeks?
otez555 [7]

Answer:

28 days

Step-by-step explanation:

You multiply 7 by 4 for find the number of days in 4 weeks, since 1 week is 7 days: 7 × 4 = 28.

Hope this helps!

8 0
2 years ago
Read 2 more answers
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tangare [24]

Answer:

-1/12

Step-by-step explanation:

you jus gotta substract and jawnt uerme! i know you got dis wrong, dont bluff cutie...

5 0
3 years ago
Read 2 more answers
What is 91/22 in decimal?
Lemur [1.5K]
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5 0
3 years ago
Which expression gives the same result as shown problem?
sineoko [7]
The first choice gives you the same result. The factor of 5 can be removed to the outside of the summation symbol.

5\sum\limits_{i=0}^{4}{\left(\dfrac{1}{3}\right)^{i}}
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