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
polet [3.4K]
3 years ago
8

A study of five hundred adults found that the number of hours they spend on social networking sites each week is normally distri

buted with a mean of 14 hours. The population standard deviation is 3 hours. What is the margin of error for a 95% confidence interval?
Mathematics
1 answer:
Nata [24]3 years ago
6 0
Margin of error formula:
ME = z * (Sigma) / √ n
z = 1.96 for a 95 % confidence interval;
Sigma = 3 ( the population standard deviation )
n = 500
ME = 1.96 * 3 / √500 =
= 1.96 * 3 / 22.36 =
= 5.88 / 22.36 = 0.263
Answer:
The margin error for a 95% confidence interval is 0.263.
You might be interested in
-4x + 2x + 3x + 8<br> Asap
Talja [164]

Answer:

x + 8

Step-by-step explanation:

1. To simplify this expression, we have to combine like terms.

  • (-4x + 2x + 3x) + (8)
  • (-2x + 3x) + (8)
  • x + 8

Therefore, the answer is x + 8.

4 0
2 years ago
In triangle ABC, AC =24, the measure of angle A = 30 degree , and the measure of angle B = 45 degree . Find the area of this tri
andriy [413]

Answer:

142.932

Step-by-step explanation:

given that in triangle ABC, AC =24

Angle A = 30 and Angle B =45

If we draw altitude from C, we get

h = 24sin 30 = 12

Since BC = h (45, 45,90 triangle)

BC=12

By sine formula for triangle

\frac{12}{sin30} =\frac{AB}{sin(180-45-30)} \\AB = 24 sin 105 = 23.1822

Area of triangle

= 1/2 (23.1822)(12)\\= 142.932

6 0
3 years ago
The vertex of the graph of f(x) = |x - 3| +6 is located at<br> Done<br> Intro
Igoryamba

Answer:

The vertex of the graph is located at the point (3,6)

Step-by-step explanation:

Here, we want to know where the vertex of the equation if plotted will be

To get this, what we have to do is to equate the expression that we have in the absolute value to zero

After this, we then proceed to solve for the value of x

We have this as;

x -3 = 0

hence;

x = 0 + 3

x = 3

to get the y-value of the vertex, we look at the value at the side of the absolute value

This value is 6 and thus, the y-value of the vertex point is 6

So the coordinates of the vertex is (3,6)

8 0
3 years ago
What the prime factorization on 75?<br><br>​
nikklg [1K]

Answer:

3*5^2

Step-by-step explanation:

75 is divisible by 3

75/3 = 25

25 is not divisible by 3, but it is divisible by 5.

25 = 5^2.

25/25 = 1. We are done.

3 0
3 years ago
What is the 13 term of the geometric sequence whit this explicit formula an=3•(-2)(n-1)
Orlov [11]

Answer:

12,288

Step-by-step explanation:

aₙ = 3 (-2)ⁿ⁻¹

a₁₃ = 3 (-2)¹³⁻¹

a₁₃ = 12,288

3 0
3 years ago
Other questions:
  • Why shouldn’t a small business owner deposit checks, cash, and coins totaling $55 and then receive $55 in cash in the same trans
    7·1 answer
  • What is the answer to this problem?  7.5/12=4.2/x
    12·2 answers
  • How does a translations 6 units up and 1 unit left change the coordinates of a shape?
    5·1 answer
  • Anyone knows how to answer any of these 2
    14·1 answer
  • 4/-2 flipped over the x axis
    9·1 answer
  • Divide 32 in the ratio 5 : 3.
    12·2 answers
  • In the middle school debate club, 30% of the members are in sixth grade. If there are 12 sixth graders in the debate club, how m
    9·2 answers
  • What is the critical value t* which satisfies the condition that the t distribution with 14 degrees of freedom has probability 0
    10·1 answer
  • the local library raised money by having a used book Rebecca volunteered to help. her task was to stick price labels on each of
    5·1 answer
  • PLSSSS HELPPPPPPP MEEEHHH ILL GIVE BRAINLY
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!