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
tiny-mole [99]
2 years ago
11

Suppose that 200 students are randomly selected from a local college campus to investigate the use of cell phones in classrooms.

When asked if they are allowed to use cell phones in at least one of their classes, 40% of students responded yes. Using these results, with 95% confidence, the margin of error is 0.068. How would the margin of error change if the sample size increased from 200 to 400 students?
Mathematics
1 answer:
serious [3.7K]2 years ago
6 0

Answer:

It would change to 0.04802

Step-by-step explanation:

from this question we have that n became 400

40% of 400

= 160

p* = 160/400

= 0.4

1 - p* =

= 1 - 0.4

= 0.6

at confidence level,

1 - 0.95

= 0.05

alpha/2 = 0.025

z= 1.96

<u>margin of error. E</u>

= 1.96 x √[(0.4 x 0.6)/400]

= 1.96 x 0.0245

= 0.04802

M.E = 0.04802

You might be interested in
Plz help me out with this one. :(
Anettt [7]
I think it is C)
I’m really sorry if I’m wrong.
4 0
3 years ago
GIVING BRAINLIEST!!! DUE IN 30 MINUTES!
oksano4ka [1.4K]

Answer:

Step-by-step explanation:

When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation). ... When the pressure exerted on a substance increases, it can cause the substance to condense.

3 0
3 years ago
Drag the missing statements and reasons to the correct spot to complete the proof
morpeh [17]

Answer:

See attached

Step-by-step explanation:

Answer is attached

7 0
3 years ago
Easy free question asdfauhdsfpauhfaowehfauwef
Liono4ka [1.6K]

Answer:

Step-by-step explanation:

Thx for the points

5 0
3 years ago
Read 2 more answers
PLEASE HELP ME!!!!<br><br> Find the volume of this sphere.<br> Use 3 for pi.
AlekseyPX

Answer:

904cm3 just use an online sphere calculator they're easy to use

4 0
2 years ago
Other questions:
  • What is the circumference of a round pizza with an area of 36 square inches?
    6·2 answers
  • What is 27 quarters. Plz. Hop me.
    9·1 answer
  • Please help me with the area photo attached
    9·1 answer
  • 30 points pls help image included
    8·1 answer
  • How do I solve for the variables r,s, and t
    7·1 answer
  • Please help with question 8! BRAINLIEST to correct answer! (C is incorrect)
    12·2 answers
  • What is y? Have been having so much trouble
    13·1 answer
  • Which of the following samples would meet the "random" condition?
    6·1 answer
  • A business owner wants to have the front window of her store painted and is considering two
    13·1 answer
  • If two lines are parallel, then<br> corresponding angles are congruent. i
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!