3 years ago

Can someone please help me

Mathematics

1 answer:

alexdok [17]3 years ago

6 0

Answer:

idk

Step-by-step explanation:

You might be interested in

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

Is this right or not

Zepler [3.9K]

Answer:

Yup its right

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

On Thursday, a local hamburger shop sold a combined total of 378 hamburgers and cheeseburgers. The number of cheeseburgers sold

yuradex [85]

Answer:

252 Cheese Bugers were sold on Thursday

Step-by-step explanation:

378 divided by 3=126

126+126= number of hamburgers

126= number of chese bugers

126+126=252

3 0

2 years ago

What's the answer for those two questions and explain how you get that answer

swat32

B. and D. For the both I'm most likely sure

3 0

3 years ago

Read 2 more answers

6(3−y) simplified plz help meeeeeee

Anuta_ua [19.1K]

Answer:

18 - 6y

Step-by-step explanation:

6(3 - y) ← multiply each term in the parenthesis by 6

= 18 - 6y

7 0

3 years ago

Read 2 more answers