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
Sliva [168]
3 years ago
9

Suppose instead of comparing independent measurements taken from two groups, you used a matched-pairs experiment and one treatme

nt is randomly assigned to each half of the pair. In this case, how should you compute the confidence interval for the difference?
Mathematics
1 answer:
lina2011 [118]3 years ago
3 0

You should use a T distribution to find the critical T value based on the level of confidence. The confidence level is often given to you directly. If not, then look for the significance level alpha and compute C = 1-alpha to get the confidence level. For instance, alpha = 0.05 means C = 1-0.05 = 0.95 = 95% confidence

Use either a table or a calculator to find the critical T value. When you find the critical value, assign it to the variable t.

Next, you'll compute the differences of each pair of values. Form a new column to keep everything organized. Sum everything in this new column to get the sum of the differences, which then you'll divide that by the sample size n to get the mean of the differences. Call this dbar (combination of d and xbar)

After that, you'll need the standard deviation of the differences. I recommend using a calculator to quickly find this. A spreadsheet program is also handy as well. Let sd be the standard deviation of the differences

The confidence interval is in the form (L, U)

L = lower bound

L = dbar - t*sd/sqrt(n)

U = upper bound

U = dbar + t*sd/sqrt(n)

You might be interested in
Solve the quadratic equation 3x^2 - 9x + 1 = 0 Give answer to 3 significant figures
Orlov [11]

Answer:

Either, (9+√69)/6 or (9-√69)/6

Step wise:

3x²-9x+1=0-------------------(i)

comparing equation onw with (ax²+bx+c=0), we get,

a=3, b=-9, c=1

now,

using Quadratic Formula,

(-b±√b²-4ac)/2a=x

{-(-9)±√(-9)²-4.3.1}/2.3=x

(9±√81-12)/6=x

(9±√69)/6=x

Taking +(ve) sign                   Taking -(ve) sign

(9+√69)/6=0                           (9-√69)/6=0

∴(9+√69)/6=0                         ∴(9-√69)/6=0

[∵They cannot be further solved]

6 0
3 years ago
What's the value? A.-20 B.-4 C.4 D.20
ale4655 [162]

Answer:

<h2>-4</h2>

Option B is the correct option.

Step-by-step explanation:

{(4 - 2)}^{3}  - 3 \times 4

Subtract the numbers

=  {(2)}^{3 } - 3 \times 4

Multiply the numbers

=  {(2)}^{3}  - 12

Evaluate the power

= 8 - 12

Calculate the difference

=  - 4

Hope this helps..

Best regards!!

4 0
3 years ago
Read 2 more answers
( 1+7 )•3/6 and (7•3)•2/6
dedylja [7]
The answer to ( 1+7 )•3/6 is 4 and (7•3)•2/6 is 7
4 0
3 years ago
Read 2 more answers
Need help help for 30 points
S_A_V [24]
100 times 17 bc u have to count the shdded parts
4 0
3 years ago
Read 2 more answers
Suppose the graph of a cubic polynomial function has the same zeroes and passes through the coordinate (0, –5).
Alexeev081 [22]
Zeros are the x values which make the function equal to zero. Set it up as you would for a binomial with a constant multiplier "k" to account for the y-intercept (0, -5) given.

f(x) = k(x-2)(x-3)(x-5)

Use the y-intercept (0,-5) to solve for k.

-5 = k(0-2)(0-3)(0-5)
-5 = -30k
-5/-30 = k
1/6 = k


The cubic polynomial function is then ..

f(x) = (1/6)(x-2)(x-3)(x-5)
 

Linear factors are the linear (line) expressions you can factor out of the polynomial. They are (x-2), (x-3) and (x-5).


5 0
3 years ago
Read 2 more answers
Other questions:
  • Bowls are purchased for $14 each and sold for $35.00. What is the percent of the markup based on cost?
    14·2 answers
  • 2m = 1 + m what do I need to do to solve
    5·2 answers
  • the graph of F(x), shown below, has the same shape as the graph of G(x)=x^2. but it is shifted up 4 units and to the right 2 uni
    15·1 answer
  • You run 1 3\4 miles each day. Your friend runs 4 times as far as you do. How far does your friend run each day ? Please help
    13·1 answer
  • How do I prove this?
    10·1 answer
  • 3x+6 factored form please help asap.
    6·1 answer
  • Answer this question please and thank you
    5·2 answers
  • Pls help ASAP. Help pls
    12·2 answers
  • Find the product of ​
    13·2 answers
  • Fill in the blanks below to solve this equation for x. +6 = 9​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!