1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tresset_1 [31]
3 years ago
7

7) In Problem 6 we poured a large and a small bowl of cereal from a box. Suppose the amount of cereal that the manufacturer puts

in the boxes is a random variable with mean 16.2 ounces and standard deviation 0.1 ounces. a) Find the expected amount of cereal left in the box. b) What’s the standard deviation? c) If the weight of the remaining cereal can be described by a Normal model, what’s the probability that the box still contains more than 13 ounces?
Mathematics
1 answer:
olga_2 [115]3 years ago
3 0

Question:

The amount of cereal that can be poured into a small bowl varies with a mean of 1.5 ounces and a standard deviation of 0.3 ounces. A large bowl holds a mean of 2.5 ounces with a standard deviation of 0.4 ounces. You open a new box of cereal and pour one large and one small bowl.

Answer:

a) The expected amount of cereal left in the box is 12.2 ounces

b) The standard deviation  \sigma_{x+y+z}, is 0.5099

c) In a Normal model, the probability that the box still contains more than 13 ounces is P(Z-(X+Y) > 13) = 5.821 %.

Step-by-step explanation:

Let X represent the amount of cereal that can be poured into a small bowl and Y represent the amount of cereal that can be poured into a large bowl and Z represent the amount of cereal that the manufacturer puts in the box, then the expected amount of cereal left in the box is given by

Z - (X + Y)

(a) The expected amount of cereal left in the box is given as

P(Z - (X + Y)) = μ = μ_Z - μ_X - μ_Y = 16.2 - 1.5 - 2.5 = 12.2 ounces

The expected amount of cereal left in the box = 12.2 ounces

b) The standard deviation is given by  the root of the sum of the variance

That is

\sigma_{x+y+z} ^2 = \sigma_x^2 + \sigma_y^2 +\sigma_z^2 and

\sqrt{\sigma_{x+y+z} ^2}  = \sqrt{\sigma_x^2 + \sigma_y^2 +\sigma_z^2} =\sqrt{0.1^2+0.4^2+0.3^2} = 0.5099

The standard deviation,  \sigma_{x+y+z}, = 0.5099

c) The probability that the box still contains more than 13 ounces is given by

P(Z-(X+Y) > 13)

Where z-score is  

z=\frac{x-\mu}{\sigma} = \frac{13-12.2}{0.5099}=  1.5689 ≈ 1.57

From the z-score table P(Z = 1.57) = 0.94179

Therefore the probability of the box containing ≤ 13 is 0.94179, that is

P(Z-(X+Y) ≤ 13) = 0.94179 and

P(Z-(X+Y) > 13) = 1 - 0.94179 = 0.05821 = 5.821 %.

You might be interested in
To keep heating costs down for a structure, architects want the ratio of surface area to volume as small as possible. An express
Vikentia [17]
For the answer to the question above, 
10/12 can be simplified down
I would divide both sides by 2 for starters, then you can see if it needs to be simplified more
10/2=5
12/2=6
Since you have an odd and an even number, you can't simplify it anymore, as 5 and 6 have no common numbers.
The correct answer is 5/6
7 0
3 years ago
Read 2 more answers
Work out<br> a) 1 1/5 + 3 2/5
Leno4ka [110]
First make it improper fraction :
6/5 + 17/5
Then add 6 and 17 :
23
The denominator doesn’t change :
So the answers is 23/5

Then you need to simplify it
How much times 5 goes in 23 :
4 times and 3 extra
So the FINAL ANSWER is : 4 3/5
5 0
2 years ago
Which function represents the graph of y=10(4)x ?<br><br><br><br> f<br><br> g<br><br> h<br><br> j
Marat540 [252]
Ok, i understand now. Your answer should be G.

If you ever have a graphing question got to desmos.com
it helps me a lot. If you plug in any equation, like this one, life will be even easier. lol
7 0
3 years ago
Read 2 more answers
What is 3008.672 multiplied by 626.7624?
Elina [12.6K]
1885722.484 is your answer

have a nice day, brainliest would be fantastic

5 0
3 years ago
Read 2 more answers
.002 is 1/10 of what
amid [387]
Let the unknown number be x.  Then (1/10)x = 0.002.  To solve for x, multiply both sides by 1000 to remove the decimal fraction 0.002.

Then 1000(1/10)x = 1000(0.002), or 100x = 2.  Dividing both sides by x returns 

x=100/2, or x= 50 (answer)
5 0
3 years ago
Other questions:
  • What is 2x – 5 &gt; 7 inequality subject
    14·1 answer
  • Give two ways to write each algebraic expression in words.
    12·1 answer
  • Solve the system of equations using the Addition method. 2a + 3b = -1 3a + 5b = -2
    6·1 answer
  • Here are the ages (in years) of 10 professors at a college. , 47, 44, 48, 43, 35, 65, 56, 37, 7351 What is the percentage of the
    13·1 answer
  • The total cost after tax to repair Kimber's cracked phone screen is represented by 0.04(30h) + 30h, where h represents the numbe
    11·1 answer
  • A beverage manufacturer performs a taste-test and discovers that people like their fizzy beverages best when the radius of the b
    15·2 answers
  • Answer or u will fail ur next FSA
    14·1 answer
  • Please answer i need help​
    11·1 answer
  • The number 0,1,2,3,4 and so on are called
    14·2 answers
  • In Eddies grade, 34 students are enrolled in health and 51 students are not. What percentage of the students in the school are e
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!