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
Rzqust [24]
3 years ago
9

Highway transportation officials are trying to determine if the average speed on Archer road is above 45mph, the post speed limi

t. They took a sample of 50 cars. The sample mean was 44.9 and the standard deviation was 10. Find the test statistic.0.010.0707-0.01-0.0707
Physics
1 answer:
USPshnik [31]3 years ago
4 0

Answer:

Option D) -0.0707

Explanation:

We are given the following in the question:  

Population mean, μ = 45 mp

Sample mean, \bar{x} = 44.9

Sample size, n = 50

Sample standard deviation, s = 10

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{44.9 - 45}{\frac{10}{\sqrt{50}} } = -0.0707

Thus, the test statistic is

Option D) -0.0707

You might be interested in
Electromagnetic radiation behaves both as particles (called photons) and as waves. Wavelength (λ) and frequency (ν) are related
inessss [21]
<h2>Answer: 136.363 m</h2>

Explanation:

We can find the wavelength of the radiation produced by the microwave oven by using the following given equation:

c=\lambda.\nu   (1)

Clearing \lambda :

\lambda=\frac{c}{\nu}   (2)

Knowing \nu=2.20 GHz=2.20(10)^{6}Hz=2.20(10)^{6}s^{-1}

\lambda=\frac{3(10)^{8}m/s}{2.20(10)^{6}s^{-1}}   (3)

\lambda=136.363m This is the wavelength of the radiation produced by the microwave

8 0
3 years ago
What happens in the red blood cells in the lungs?
hichkok12 [17]
The correct answer is A hemoglobin
3 0
3 years ago
Without sea otters, sea urchins would overgraze on kelp beds, dramatically changing the marine community. true/false
Bumek [7]
True is the anwser to your question
 Hope this helps
5 0
3 years ago
Read 2 more answers
What homemade things could I use for wheels on a small balloon powered car?
Fantom [35]

You can use mostly anything as long as it is circular. Depending on how big it is, you could use sturdy paper plates and use a stick/rod and tape to hold it together, or you could use bottle caps if the car you are trying to make is really small.

8 0
3 years ago
Read 2 more answers
Use this excerpt from the text to answer the question. "Some people insist the United States is more properly called a republic
Bond [772]
Political power is utilized in a roundabout way by chose authorities, not straightforwardly by the natives themselves. Oftentimes, legislators and numerous standard Americans allude to the United States as a majority rules system. Others locate this disturbing in light of the fact that, not at all like in a vote based system where nationals vote specifically on laws, in the United States, chose agents do – and, thusly, the U.S. is a republic.
4 0
3 years ago
Other questions:
  • true or false? Heather and Matthew walk with an average velocity of .75 m/s eastward. If it takes them 25 min to walk to the par
    7·1 answer
  • The actions of an employee are not attributable to the employer if the employer has not directly or indirectly encouraged the em
    6·1 answer
  • what happens to the specific heat capacity of a material if it changes state? i.e. from solid to liquid
    8·1 answer
  • How to explain horizontal in words
    15·1 answer
  • Two forces P and Q act on an object of mass 7.00 kg with Q being the larger of the two forces. When both forces are directed to
    15·1 answer
  • What value is needed to create a motion diagram? a. position c. time interval b. velocity d. both a and c
    8·1 answer
  • John often sees squiggly lines when he looks at a bright sky or white paper. His doctor says that they are called eye floaters,
    12·2 answers
  • What is the name of the phenomenon that causes observed light from a star to change its wavelength?
    15·1 answer
  • What is the microcoulomb if the coulomb is 1,00​
    12·1 answer
  •  what is the difference between repelling and attracting
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!