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olya-2409 [2.1K]
3 years ago
11

The weight of bags of coffee beans at the grocery store follows a Normal distribution with a mean of μ = 7 ounces and a standard

deviation of σ = 2 ounces. Suppose we pick four bags of coffee beans at random from the shelf and find their total weight, W. Which of the following statements describes the random variable W?
A. The random variable W is Normal, with a mean of seven ounces and a standard deviation of two ounces.
B. The random variable W is Normal, with a mean of 28 ounces and a standard deviation of 16 ounces.
C. The random variable W is Normal, with a mean of 28 ounces and a standard deviation of four ounces.
D. The random variable W is binomial, with a mean of 28 ounces and a standard deviation of four ounces.
E. The random variable W is binomial, with a mean of seven ounces and a standard deviation of two ounces.
Mathematics
1 answer:
aleksley [76]3 years ago
4 0

Answer:

C.

Step-by-step explanation:

The random variable W is Normal, with a mean of 28 ounces and a standard deviation of four ounces.  

mean of total = 7+7+7+7 = 28

Variance of total = 4+4+4+4 = 16

SD of total = sqrt(16) = 4

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OverLord2011 [107]

Answer:

-1/8 > x

Step-by-step explanation:

Rewrite the equation to -1 > 8x, so -1/8 > x

Dot -1/8 on the number line, and everything on the left of that point( if right is positive ) is x .

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3 years ago
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How much would $300 invested at 4 percent interest compounded monthly be worth after 8 years round your answer to the nearest ce
ratelena [41]
We will use the equation  A(t)=P(1+ \frac{r}{n})^{(n)(t)}, where P is the initial amount invested, r is the interest rate in decimal form, n is the number of times in a year the money is compounded, and t is the number of years the money will be invested.  Our P = 300, r = .04, n = 12 (there are 12 months in a year), and t = 8.  Filling in accordingly,  A(t)=300(1+ \frac{.04}{12})^{(12)(8)}.  Simplifying what we can gives us  A(t)=300(1+.00333333)^{96}.  Doing that addition inside the parenthesis and then raising that number to the 96th power gives us A(t) = 300(1.376395075)  so A(t) = $412.92, choice B above.
8 0
4 years ago
How do I solve for X <br>-1/2x+1=-x+8​
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3 0
3 years ago
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You roll a fair 6 sided die what is P roll less than 4
Veseljchak [2.6K]

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1/2

Step-by-step explanation:

Die : 1,2,3,4,5,6

Less than 4: 1,2,3

P (less than 4) = Number of options less than 4/ total

                        = 3 /6

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7 0
4 years ago
A car rental agency advertised renting a car for $27.95 per day and 0.26$ per mile. If Trevor rents this car for 4 days, how man
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Answer:

339 miles.

Step-by-step explanation:

Given:

A car rental agency advertised renting a car for $27.95 per day and 0.26$ per mile.

If Trevor rents this car for 4 days.

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How many whole miles can he drive on a $200 budget?

Solution:

Total budget = $200

Trevor rents car for number of days = 4

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