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
Nana76 [90]
4 years ago
14

The following transformation was made on 79 values of a variable W. U=W-54.5/6. Statistics computed from U were U bar = 6.8, var

iance of u = 1.8. Find W bar and variance of W.
U =W-54.5/6. Statistics computed Mean of U as 6.8 and Variance as 1.8. Find mean of w and variance of w
Mathematics
1 answer:
Pavel [41]4 years ago
3 0

solution:

If U=W-(54.5/6) then W=U+(54.5/6).

Assuming a one-for-one transformation, the mean for W is found by adding all the W data together then dividing by 79.

That is, Wbar=(w1+w2+w3+...+w79)/79.

But w1=u1+54.5/6, w2=u2+54.5/6, etc.

So Wbar=(u1+u2+...+u79)/79+(79×54.5/6)/79=Ubar+54.5/6=6.8+54.5/6=15.8833 approx.

The variance is unaffected by the transformation since variance is simply the spread of the data which doesn’t change.

Wbar=Ubar=1.8.


You might be interested in
Solve the system of equations:<br><br> (1) x - y = 3<br><br> (2) 7x - y = -3
arlik [135]

Answer:

x= 70

and y = 67 then

-70-67 =-3

4 0
3 years ago
Read 2 more answers
The diameter of a circle has endpoints A(1, 3) and B(4, 7), what is the
lana [24]

Answer:

The circumference of the circle is 5π

Step-by-step explanation:

First we need to calculate the diameter  

for this we have to know the distance between A(1, 3) and B(4, 7)

X =  Xb - Xa

X = 4 - 1

X = 3

Y = Yb - Ya

Y = 7 - 3

Y = 4

b - a = (3 , 4)

now that we have the distance of x and r we can calculate its distance using Pythagoras

h = hypotenuse

x = leg 1 = 3

y = leg 2 = 4

h² = x² + y²

we replace the known values

h² = (3)² + (4)²

h² = 9 + 16

h² = 25

h = √25

h = 5

The diameter of the circle is 5

Now we need to calculate the circumferencefor this we need to use the circumferenc formula of a circle:

c = circumference

d = diameter = 5

π = pi

c = π * d

we replace with the known values

c = 5  * π

c = 5π

The circumference of the circle is 5π

4 0
4 years ago
Can y’all help me with this answer choice question plz
serg [7]

Answer:

G, 113.04

Step-by-step explanation:

To find the area of the head of the nail you need to use the*

> A= π*r^2* A equals area, π equals pi(3.14) and then you square your raidius, which is 6 in your case.

π*r^2

plug in your six as the *r

π*6*^2

solve 6^2=36 and multiply that by your π which is 3.14

3.14*36

=113.04

Hope that helped!! :)

3 0
3 years ago
Read 2 more answers
Haley has a collection of necklaces. Last month, she had 40 necklaces. She now has 76 necklaces.
Maurinko [17]

Answer:

74%

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
An angle of 34°. If the arc is 162 feet tall, how far away is the bus? Round to the nearest tenth.
marta [7]

Answer:

the answer is 134 hope this helps.

8 0
3 years ago
Other questions:
  • Please help with this and more, question attached
    5·1 answer
  • San Francisco is one of the most expensive cities in which to live in the United States. As of February 2013, the mean rent for
    13·1 answer
  • What is the determinant of
    13·2 answers
  • James notes the angle of elevation of the top of tower to be 30 degree if James is 100meter away horizontally from the base of t
    14·1 answer
  • at the shelter there are 15 dogs 12 cats three snakes and five parakeets what percent of the number of cats is the number of dog
    11·2 answers
  • System by substitution.<br> Tar 7x - 3y=8<br> y=3x
    9·1 answer
  • If F is the function defined by F(x)=3x−1, find the solution set for F(x)=2.
    15·1 answer
  • I'LL MARK BRAINLIEST !!!
    7·1 answer
  • A bottled water company runs a promotion in which 1 out of every 4 bottles has the word "Winner" printed under the
    14·1 answer
  • The product of a number and -4 is 80<br> *please help ;-;*
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!