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
vredina [299]
3 years ago
5

A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate

the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95% confident that his estimate is in error by no more than two percentage points? a)Assume that nothing is known about the percentage of computers with new operating systems. b) assume that a recent survey suggest that about 89% of computers use a new programming system.
Mathematics
1 answer:
GarryVolchara [31]3 years ago
5 0

Answer:

n = 1067

Step-by-step explanation:

Since nothing is known, we would assume that 50% of the computers use the new operating system. So, standard error = 0.5/SQRT(n)  

Z-value for a 95% CI = 1.9596

So, margin of error = 1.9596 x 0.5 / SQRT(n) = 0.03

So, n = 1067 (approx.)

This will be your approximate answer : n = 1067

You might be interested in
The diameters of cherry tomatoes produced by a large farm have an approximately Normal distribution, with a
Citrus2011 [14]

Answer: D. 0.9967

Step-by-step explanation: To solve this, you need to do the z-score formula with both numbers. So 30-22/2.5 = 3.2. On the z-score chart, that equals .9993. Hold onto that number. Then you do the same with 15. 15-22/2.5 = -2.8. On the z score chart, that equals .0026. Subtract those numbers. .9993 - .0026 = .9967. It's not as compacted as it looks <3

7 0
3 years ago
The printer print in 4 1/2 minutes?​
irga5000 [103]

Answer:

4 1/2 in seconds is 14400

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
If $5,000 is borrowed with an interest of 12.3% compounded semi-annually, what is the total amount of money needed to pay it bac
jarptica [38.1K]

Answer:

$7153.03

Step-by-step explanation:

To find the total amount after 3 years, we can use the formula for compound tax:

P = Po * (1+r/n)^(t*n)

where P is the final value, Po is the inicial value, r is the rate, t is the amount of time and n depends on how the tax is compounded (in this case, it is semi-annually, so n = 2)

For our problem, we have that Po = 5000, r = 12.3% = 0.123, t = 3 years and n = 2, then we can calculate P:

P = 5000 * (1 + 0.123/2)^(3*2)

P = 5000 * (1 + 0.0615)^6

P = $7153.029

Rounding to the nearest cent, we have P = $7153.03

3 0
3 years ago
0.8344 rounded to the nearest thousandth would be?
stiks02 [169]

Answer:

Look at the place after the thousandths, it is less than 5.

0.8344

So don't add +1 to the thousandths place.

Rounded to the nearest thousandths would be:

<h2>0.834</h2>

8 0
3 years ago
Read 2 more answers
If a 20 in. by 30 in. window has a wooden frame 4 inches wide surrounding it, what is the total area of the window and frame?
Crank
I believe the formula is lxwxh if so it's 20 x 30 x 4= 2400 i hope this helped
7 0
3 years ago
Read 2 more answers
Other questions:
  • Help me please ASAP!!!!!!
    10·1 answer
  • Solving Linear Equations SUDOKU<br>help me figure this out please ​
    6·1 answer
  • Use the grouping method to factor the polynomial below completely.<br> x3 - 3x2 + 5x - 15
    13·2 answers
  • Striking a tuning fork harder makes the sound coming from the fork louder. This changes the _________ of the sinusoidal graph.
    8·1 answer
  • Is 0.82 (reapting) rational
    5·1 answer
  • What is 0.2(x+2)-2=0.4
    5·1 answer
  • Try your best guess, but pls give an explanation!
    14·1 answer
  • PLEASE SOLVE! Also how do you properly solve them ( please include steps)
    7·2 answers
  • Determine the sum of the Natural numbers up to 1000 which are not divisible by 5
    10·1 answer
  • Can someone help me pls and if you have a time to explain it how to do it…
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!