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
elena55 [62]
3 years ago
8

4. The students of a Statistics class want to estimate how many years it takes for a university professor to earn a PhD. They su

rvey a random sample of 40 professors with PhDs, which results in a sample mean of 5.4 years and a standard deviation of 1.6 years. Which of the following represents the 95% confidence interval for the true mean of the number of years it takes a professor to earn a PhD?
(A) 5.4±1.96(1.6)
B) 5.4 ± 1.96 (1.6/40)
​ C) 5.4±1.96(1.6/√40)
D) 5.4 ± 2.03 (1.6/40)​
D) 5.4 ± 2.03 (1.6/√40)​

Advanced Placement (AP)
1 answer:
Arte-miy333 [17]3 years ago
5 0

Answer:

E)

(or second D)

Explanation:

The picture shows the confidence interval and from there you just basically solve each of the answer's equations till you get one that is the same or the closest to the true interval. For this problem the answer was E).

5.4+2.03(1.6/√40)=5.91355

And

5.4-2.03(1.6/√40)=4.88644

You might be interested in
10. Lindsey is an avid tennis player. She kept track of the number of winners she had per game for an entire season. The shape o
Wewaii [24]

Answer:

c

Explanation:

8 0
3 years ago
Which of the following is true of an instinct?
hjlf

Answer:

They are complex behaviors that are automatic and unlearned and occur in all members of a species

Explanation:

4 0
2 years ago
What were denis diderots thoughts on government
Debora [2.8K]

Answer:

Denis Diderot lifework, the Encyclopedia, was a powerful weapon against ecclesiastical and governmental institutions. It revealed the truth; it contained “maxims that would tend to destroy royal authority… and lay the foundations for the corruption of morals and religion”

Explanation:

4 0
3 years ago
If enough experimental data supports a hypothesis, then it
matrenka [14]

Answer: The hypothesis would become a theory.

6 0
3 years ago
N a particular country in 1995, the average worker needed to work 30 hours to produce 40 units of output. in that same country i
SVETLANKA909090 [29]

honey if you don't understand u can always ask a teacher

6 0
1 year ago
Other questions:
  • Is the relation {(-2.2)(3,5)(4,2),(3,-1) a function
    15·1 answer
  • The full range of a pixel byte is ____________.
    13·1 answer
  • (29 points) Which of the following describes what dominates a traditional economy?
    5·2 answers
  • True or false you will probably read a mystery novel much faster than a science textbook
    11·2 answers
  • Which system uses a nonerenewable resource to generate electricity?
    12·1 answer
  • On a clear night the International Space Station has an angular size of about 49 arcseconds. How big is this in radians?
    13·1 answer
  • Which option should you choose to send an email you've received to a new person? Reply All Reply Forward CC ​
    14·1 answer
  • RESPETAR LA CAPACIDAD DE CARGA DE UN DESTINO, LE ALARGA LA VIDA UTIL.
    5·1 answer
  • How can psychology have an effect on society?
    15·1 answer
  • 11) Calculate the wavelength of light emitted when each of the following transitions occurs in the hydrogen atom.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!