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
igomit [66]
4 years ago
13

Assume that a sample is used to estimate a population mean μ μ. Find the margin of error M.E. that corresponds to a sample of si

ze 19 with a mean of 30.8 and a standard deviation of 10.5 at a confidence level of 99.5%.
Mathematics
1 answer:
JulijaS [17]4 years ago
5 0

Answer:

The margin of error is 30.22

Step-by-step explanation:

Sample size 19(lesser than 30), and we only have the sample standard deviation. So we use the t-distribution.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 19 - 1 = 18

Now, we have to find a value of T, which is found looking at the t table, with 18 degrees of freedom(y-axis) and a confidence level of 0.995(t_{995}). So we have T = 2.878

The margin of error is:

M = T*s = 10.5*2.878 = 30.22

You might be interested in
FLIP THE PIC<br><br>PLEASE HELP MEEEEEEEEEEEEEEEEEEEE​
Liula [17]

Answer:

18.21 cm^2.

Step-by-step explanation:

Area of the unshaded part

= area of the square - area of the quadrant

= 7^2 - 1/4 pi *7^2

= 49 - 30.788

= 18.21 cm^2.

3 0
3 years ago
Is 3.4*10 ^ 8 a correct scientific notation
prohojiy [21]

Answer:

yes

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
PLEASE HELP ME I WILLLL GIVE BRAINLEST PLEASE HELP FAST IM ON A TIME LIMIT
viktelen [127]
It would be 62 hope this helps
5 0
3 years ago
Read 2 more answers
PLEASE HELP .........
joja [24]

Answer:

11860.22 rev/hour

Step-by-step explanation:

The diameter if a cylinder, d = 21.02 inches

Radius, r = 10.51  inches

or

r = 0.875 feet

The linear speed of a point on the cylinder's surface is 18.12 ft/sec.

We need to find the angular speed of the cylinder.

The relation between the linear speed and the angular speed is given by :

v=r\omega

Where

\omega is angular speed

\omega=\dfrac{v}{r}\\\\\omega=\dfrac{18.12}{0.875}\\\\\omega=20.7\ rad/s

or

\omega=11860.22\ rev/hour

So, the required angular speed of the cylinder is 11860.22 rev/hour.

4 0
3 years ago
Does a right triangle have perpendicular sides?<br> Does a quadrilateral have perpendicular sides?
Elza [17]
A right triangle does have perpendicular line because they can cross if the lines go on forever
A quadilateral is a 4 sided shape so if you talking about the square or a rectangle or a parralelogram no it does not have perpendicular sides BUT if you are talking about a trapezoid it does have pependicular side

HOPE THIS HELPS!!!!!!! ;-)
PLZ MARK ME AS BRAINLIEST!!!
6 0
4 years ago
Other questions:
  • I need help finding the end behavior
    12·1 answer
  • Solve for A: 8A – 3(A – 4) = -3<br> What are the steps to get me this answer
    6·2 answers
  • start with $200 in the account and has earned a total of $8 in interest in 2 years what is the rate of the account
    7·1 answer
  • Can someone help me please? Use the linear combination method to solve the system of equations. Pretty please show your work and
    15·2 answers
  • Why is how many continents are there not a statistical question
    8·2 answers
  • Find the area bounded by the given curves: <br> y=2x−x2,y=2x−4
    7·1 answer
  • I don’t know this please help..
    9·1 answer
  • The product of sin 30° and sin 60° is same as the product of and .
    9·2 answers
  • A laptop computer is purchased for $2000. After each year, the resale value decreases by 25%. What will the resale value be afte
    11·1 answer
  • Giving 20 brainly points
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!