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
vagabundo [1.1K]
3 years ago
5

At a local restaurant, the amount of time that customers have to wait for their food is normally distributed with a mean of 18 m

inutes and a standard deviation of 4 minutes. Using the empirical rule, determine the interval of minutes that the middle 99.7% of customers have to wait.
Mathematics
1 answer:
Colt1911 [192]3 years ago
3 0

Answer:

99.7% of customers have to wait between 8 minutes to 30 minutes for their food.

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 18 minutes

Standard Deviation, σ = 4 minutes

We are given that the distribution of amount of time is a bell shaped distribution that is a normal distribution.

Empirical Formula:

  • Almost all the data lies within three standard deviation from the mean for a normally distributed data.
  • About 68% of data lies within one standard deviation from the mean.
  • About 95% of data lies within two standard deviations of the mean.
  • About 99.7% of data lies within three standard deviation of the mean.

Thus, 99.7% of the customers have to wait:

\mu -3\sigma = 18-3(4) = 6\\\mu +3\sigma = 18+3(4) = 30

Thus, 99.7% of customers have to wait between 8 minutes to 30 minutes for their food.

You might be interested in
Robin puts 5/8 cups of water into her recipe. Noel puts 1/3 the amount of water that Robin puts in her recipe. How much water do
GrogVix [38]
You are going to subtract.
<span>5/8 - 1/3 equals  to 7/24</span>
7 0
3 years ago
Pls help with this ..its to be submitted this monday.....pls pls pls
Svet_ta [14]

Answer:

9pr = 2q^2

Step-by-step explanation:

28.

px^2 + qx + r = 0

If one root is A then the other root is 2A

We have A + 2A = -q/p   and A*2A = r/p

So 3A = -q/p  so A = -q/3p and  A^2  = r/2p  so A = √ (r / 2p)

Equating  these 2 equations:-

-q/3p =  √(r / 2p)

q^2 / 9p^2 = r / 2p

9p^2r = 2pq^2

9pr = 2q^2   (answer)


6 0
3 years ago
. 18 convert to a fully reduced fraction
Taya2010 [7]

Answer:

9/50 im pretty sure

Step-by-step explanation:

you should vote me brainliest pleaseeeeeeeeeeeee

4 0
3 years ago
Read 2 more answers
The weights of baskets of strawberries are normally distributed with a mean of 3.8 ounces and a standard deviation of 1.1 ounces
Crazy boy [7]

Answer:

6 ounces

Step-by-step explanation:

this one is mainly elimination. 3.8 and 4.9 cant be because they're too close to the mean. and 7.1 is too far. you can also use z-score. the z score of .975 is 1.96 we can plug that into out formula so

1.96=(x-3.8)/1.1

multiply both sides by 1.1 and then add 3.8

you can also use scientific calculator.

second vars, 3, the area is your percent so .975, the u is mean so 3.8, the o is standard deviation so 1.1

7 0
2 years ago
18z-13=-4 solve for z
Murljashka [212]

Answer: 20 ;)

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Sheryl creates a scatter plot to analyze how an increase in the outside temperature above 52°F affects the sale of hot chocolate
    12·1 answer
  • What does subtracting a negative do ?
    15·2 answers
  • 5. Friday night’s hockey game was attended by 180 students. This is about 60% of the school’s population. What is the total popu
    8·1 answer
  • a 6lb watermelon costs $2.40 before a 30% discount. Which equation would allow you to find the discounted price of the watermelo
    14·1 answer
  • An item costs $4 before tax<br>and $4.32 after sales tax.<br>What is the sales tax rate?​
    11·2 answers
  • A square pyramid has a volume of 108 cubic feet and a height of 4 feet.
    6·1 answer
  • 4 p^2 without exponents
    14·1 answer
  • What is the solution to 8x - 3(2x - 4) = 3(x - 6)?<br> A.30<br> B.2<br> C.6<br> D.No solution
    14·1 answer
  • One column of numbers consists of 28,42,14. When the digits of the numbers are added together, the result is 2+8+4+2+1+4=21, and
    11·1 answer
  • Safara wants to rent a bicycle the graph shows the cost for renting a bicycle for different lengths of time. What is the slope o
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!