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
vovangra [49]
3 years ago
11

You wish to find a 95% confidence interval for the mean number of times men change channels with a remote control during a comme

rcial. based on a preliminary study, you estimate σ = 15. how many commercials' worth of data do you need to have a margin of error no more than 3?
Mathematics
1 answer:
gogolik [260]3 years ago
4 0
For margin of error to be a maximum of 3:
3 = z*(SD / sqrt(n)), where z is the z-score, SD is the standard deviation and n is the sample size.
z = 1.96 for a 95% confidence interval, and we are given SD = 15.
3 = 1.96*15/sqrt(n)
sqrt(n) = 9.8
n = 96.04 ~ 96 commercials.

You might be interested in
Simplify 12 to the 16th power over 12 to the 4th power
dexar [7]

\dfrac{12^{16}}{12^4} = 12^{16 - 4} = 12^{12}

6 0
3 years ago
Yes help please thxssssssssssssssssssssssssssss
Charra [1.4K]
Answer=7/20

If there’s 20 total and there’s 7 blue it should be 7/20
3 0
2 years ago
Read 2 more answers
Priya completed 9 exam questions. This is 60% of the questions on the exam.
Naily [24]
A and B.

60/100 • p = 9 will give you 60 % of the test questions

0.6p = 9 will also give you 60% of the test questions

60 - p = 9 will take away 60 questions from the test making it wrong

60+p = 9 will add 60 questions to the test making it wrong

9+p = 60 will add 9 questions to the test making it wrong
8 0
3 years ago
Diameter of a circle is something the length of its radius
Ede4ka [16]

the radius is half of the diameter, so d = 2r , or double the radius :)

3 0
2 years ago
Simplify the problem given.<br><br> 9/6 - x/4 - 2/8
ruslelena [56]

Answer: The answer is - x-5/4

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Find the area of each figure. use 3.14 for pi
    7·1 answer
  • Your gym membership costs $33 per month after an initial membership fee . you paid a total of $228 after 6 months.
    13·1 answer
  • What is -9.98 as a fraction?
    8·2 answers
  • Can someone please help me? thanks!
    15·2 answers
  • What is equivalent to 10x - (5x -1)
    7·2 answers
  • Divide 15 in the ratio 2:1 =?
    9·1 answer
  • (H/6 )- (1)<br> Solve for H<br> Please help me
    12·1 answer
  • For the following pairs of equations explain why the equations are NOT equivalent.
    11·1 answer
  • Which equation represents the statement L is between R and T.
    11·1 answer
  • How do you do this? Help
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!