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Levart [38]
3 years ago
9

A shipping company handles containers in three different sizes: (1) 27 ft3 (3 × 3 × 3), (2) 125 ft3, and (3) 512 ft3. Let Xi (i

= 1, 2, 3) denote the number of type i containers shipped during a given week. With μi = E(Xi) and σi2 = V(Xi), suppose that the mean values and standard deviations are as follows: ?1 = 230 ?2 = 240 ?3 = 120?1 = 11 ?2 = 12 ?3 = 7(a) Assuming that X1, X2, X3 are independent, calculate the expected value and variance of the total volume shipped. [Hint: Volume = 27X1 + 125X2 + 512X3.]expected value ft3variance ft6(b) Would your calculations necessarily be correct if the Xi's were not independent? Explain.The expected value would not be correct, but the variance would be correct. Neither the expected value nor the variance would be correct. The expected value would be correct, but the variance would not be correct.Both the expected value and the variance would be correct.
Mathematics
1 answer:
inysia [295]3 years ago
6 0

Answer:

Sorry I have no idea lol. I hope you find your answer soon.

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(7q3r2 + 5qr2 + 23q) + (−5qr2 − qr² − 11q − 4q3r2) adding polynomials horizontally
zysi [14]

You can remove the  parentheses:-

= 7q^3r^2 + 5qr^2 + 23q + −5qr^2 − qr^2 − 11q − 4q^3r^2  ( because there is + outside)

Bring like terms together

= 7q^3r^2 − 4q^3r^2  + 5qr^2  − 5qr^2 − qr^2 + 23q − 11q

= 3q^3r^2 - qr^2 + 12q   answer

5 0
3 years ago
Can you guys help me out!! Also can y’all show the work!
Lelechka [254]

Answer:

233.3 cubic units

Step-by-step explanation:

Volume of a pyramid

=  \frac{1}{3} × base area × height

The volume of the pyramid

=  \frac{1}{3}  \times (10 \times 10) \times 7

= \frac{1}{3}  \times 100 \times 7

= 233.333...

= 233.3 cubic units (rounded to the nearest tenth)

7 0
3 years ago
Read 2 more answers
HELP HELP HELPPPPPPPPP im in k12
Rus_ich [418]

Answer:

The outcomes appear to be equally likely, so a uniform probability model is a good model to represent the probabilities in Tyra's experiment.

Step-by-step explanation:

Probability model, also known as Probability distribution, is a mathematical function that shows the probability of any outcome to occur in an experiment. When those probabilities of occurence  are the same for all possible outcomes, it is a uniform probability distribution.

For example, if you roll a fair dice, the probability of having the number 1 is 1/6; for 2 is also 1/6 and etc,

In Tyra's experiment, when the calculates the frequency of each number card,  the values are closer together. This means that the probability of taking a card with number 1 written on it is almost the same as taking a card with number 2 and so. In conclusion, Tyra's experiment is au uniform probability model.

If you can give brainliest or just a thanks <3

6 0
2 years ago
Jenny watched 27 movies that she thought were very good. She watched 45 movies over the whole year. Of the movies she watched, w
Serjik [45]

if we take 45 as the 100%, what is 27 off of it in percentage?

\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 45&100\\ 27&x \end{array}\implies \cfrac{45}{27}=\cfrac{100}{x}\implies \cfrac{5}{3}=\cfrac{100}{x} \\\\\\ 5x=300\implies c=\cfrac{300}{5}\implies c=60

6 0
3 years ago
#6 Dave surveyed 80 7th-graders and 90 8th-graders. He found that about 75% of the 7th-graders like pop music, while 80% of the
lord [1]

Answer:

i would put A

Step-by-step explanation:

6 0
3 years ago
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