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
Andreas93 [3]
3 years ago
10

A software developer wants to know how many new computer games people buy each year. Assume a previous study found the standard

deviation to be 1.7. She thinks the mean is 6 computer games per year. What is the minimum sample size required to ensure that the estimate has an error of at most 0.14 at the 95% level of confidence? Round your answer up to the next integer.
Mathematics
1 answer:
Marrrta [24]3 years ago
3 0

Answer:

The minimum sample size required to ensure that the estimate has an error of at most 0.14 at the 95% level of confidence is n=567.

Step-by-step explanation:

We have to calculate the minimum sample size n needed to have a margin of error below 0.14.

The critical value of z for a 95% confidence interval is z=1.96.

To do that, we use the margin of error formula in function of n:

MOE=\dfrac{z\cdot \sigma}{\sqrt{n}}\\\\\\n=\left(\dfrac{z\cdot \sigma}{MOE}\right)^2=\left(\dfrac{1.96\cdot 1.7}{0.14}\right)^2=(23.8)^2=566.42\approx 567

The minimum sample size to have this margin of error is n = 567.

You might be interested in
Please help me Find a, b, and c
zlopas [31]

Answer:

It is A.

Step-by-step explanation:

To solve for b, use the 45-45-90 triangle theorem, in which each of the legs is x, so the legs would be 8. The hypotenuse would therefore be 8√2.

So without further solving the answer is A, since it's the only one with 8√2.

However, I will still solve for A and C. Using the 30-60-90 theorem, we have the sides as x, x√3, and 2x. The second longest side is b. Using this, we find a = 4√6 and c to be 4√2

3 0
3 years ago
Mr. Fry is building a fence around his pool. •Length of the fence is 60 feet. •Width of the fence is 30 feet. How many yards of
Alenkinab [10]
C)90 because if it go all the way around it would be 180 and I don't see that
8 0
3 years ago
What is the equation of the line that is parallel to the line y - 1 =4(x+3)? no links.
Misha Larkins [42]

Answer:

4th option

Step-by-step explanation:

The slope m = 4

b = 32-(4×4) = 16

y = mx+b

or, y = 4x+16

Answered by GAUTHMATH

3 0
3 years ago
Solve for x and y. Thank u so much!!​
Setler79 [48]
Y is 45 x is 30 I think
7 0
3 years ago
Find the Mean of the following set of data. (Round to the
Vikentia [17]

Answer:

2.75

Step-by-step explanation:

to get the mean all you have to is add all the numbers up then divide by how numbers there are. so 3e is what u get when u add them up then divide by 12 and u get 2.75

3 0
3 years ago
Other questions:
  • Choose the equation below that represents the line passes to the point (7,-2) an the slope of -3
    13·1 answer
  • 1/2 spoon of sugar for 2 cups , how many cups for 2/3 sugar of spoon? Explain
    7·2 answers
  • 4km in the ratio 9:4:7​
    8·1 answer
  • The length of a rectangle is 5 meters greater than the width. The perimeter is 150 meters. Find the width AND the length.
    10·1 answer
  • Use Pascal's Triangle to expand (b - 3a)^4
    14·1 answer
  • write an equation of the line that passes through the given point is a parallel and B perpendicular to the given line (4,3)​
    8·1 answer
  • Find the distance between (-3,5) and (-6, -4) please help
    8·1 answer
  • Which is the most suitable identity to find product of (4x + 5) (4x – 1)
    13·2 answers
  • HELPPP plzzzzzz im so lost i hate math -.-
    12·2 answers
  • The value of y is directly proportional to the value of x.If y=12 when x=9, what is the value of x when y=80
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!