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
Nitella [24]
3 years ago
12

Hungry Howies, a local pizza delivery chain, wants to provide the best service possible for its customers. They decide to record

the delivery times 100 randomly selected days, taking the average each day. The resulting distribution is approximately normally with an overall mean of 31.2 minutes.
(a) On one randomly selected day the average delivery time was 34 minutes, which is 0.43 standard deviations above the mean. What is the standard deviation of the distribution?
Advanced Placement (AP)
1 answer:
Olin [163]3 years ago
5 0

Answer:

6.5 minutes

Explanation:

We solve this question using this z-score formula.

z = (x-μ)/σ

where x is the raw score

μ is the population mean

σ is the population standard deviation

z = standard deviations above the mean = 0.43

x = 34 minutes

μ = 31.2 minutes

σ = unknown

n = 100

0.43 = (34 - 31.2)/ σ

0.43 = 2.8 / σ

Cross Multiply

0.43 × σ = 2.8

σ = 2.8/0.43

σ = 6.511627907

The standard deviation of the distribution is approximately 6.5 minutes

You might be interested in
Think about how you would like education to be handled for future generations. Is it time for a change, or perhaps not? Virtual?
KonstantinChe [14]

Answer:

i think

Explanation:  i think we should sall be homesucled on robloc because it is fun for mayne generations. my grandma plays roblox

3 0
3 years ago
What factors drew an increasing number of Americans into the West? How did the settlement and development of these lands affect
loris [4]

Answer

Americans believed that the West was divinely enjoined to be part of the United States.

<u>Explanation:</u>

Migration was an important factor in the development of America. The West attracted many peoples. Future generations looked at the borders of their settlements in the western crisis zones. A huge amount of land sold very cheaply or given away free of charge made it easier to set up a farm without worrying about initial debt.

So the unsuccessful and unemployed citizens takes this to escape from bad times and headed west, where there was cheap land, and even set up homesteads. Gold and other precious metals were discovered and that led some people there to gain wealth without hard work. The reservation system has been designed so that Native Americans stay away from land that European Americans would like to settle.

The eastern settlement was replaced by the Great Plain and the loss of the bison and growth affected in the number of white settlements. The arrival of Europeans on the continent affected the Midwest. But before that the American Indians were already started to occupy those western lands.

6 0
4 years ago
3b+8b+2b whatis this i need to know because I am dumb.
Andru [333]
13b
add all of the numbers together and there you go
8 0
4 years ago
Conducting an in-depth interview of a single person with a rare illness is an example of
likoan [24]
The answer is D- a case study.

It's the same meaning of case as is used in police investigations- "they solved the robbery case". It's one study- or investigation- of something that may happen again.
7 0
4 years ago
Humans interfere in the hydrologic cycle in all of the following ways except:
alexira [117]

Answer:

C. Transpiration from leaves enters the atmosphere

Explanation:

All of the rest are things humans interfere with. Humans build dams that flood ecosystems, mess with rivers so that boats can flow through more easily, deforest tropical areas, and pump groundwater for irrigation. All of these are things us humans do that interfere with the environment and hydrologic cycle. Transpiration of leaves enters the atmosphere is something that is done naturally with no human interference.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Polly is pushing a box across the floor with a force of 30 N. The force of gravity is –8 N, and the normal force is 8 N. Which v
    6·2 answers
  • The definition of ________ is a pattern of shared meaning and behavior among a group of people that is passed from one generatio
    13·2 answers
  • How do you find the derivative of a graph
    12·1 answer
  • Which of the following consumes the smallest amount of water in the United States?
    5·2 answers
  • What is an example of fundamental attribution error
    7·1 answer
  • Which is the best investment option for a person who wants to make a long-term,tax-free investment?
    15·2 answers
  • Two plant species interbreed and produce hybrid offspring. These offspring are unable to reproduce with either of the parent spe
    6·1 answer
  • Many machines make work easier by spreading the work out over a _ _ <br>(2 words)<br>​
    5·1 answer
  • Which of these describes a situation of elastic demand?
    5·1 answer
  • Judaism is based in what belief
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!