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
sweet-ann [11.9K]
3 years ago
5

Given the following data from a repeated-measures design study examining the effect of a treatment by measuring a group of 9 par

ticipants before and after they received treatment:
Participant Before After
A 8 7
B 7 5
C 6 6
D 7 6
E 9 7
F 8 5
G 5 4
H 9 4
I 7 4
a. Calculate the difference scores and MD.
b. Compute SS, sample variance, and estimated standard error.
c. Is there a significant treatment effect?
Mathematics
1 answer:
prisoha [69]3 years ago
6 0

Answer:

MD = 2

SS = 18

SAMPLE VARIANCE = 2.25

STANDARD ERROR = 0.5

Step-by-step explanation:

Given :

A 8 7

B 7 5

C 6 6

D 7 6

E 9 7

F 8 5

G 5 4

H 9 4

I 7 4

Difference, d = Before - After

______ d

A 8 7 __ 1

B 7 5 __ 2

C 6 6 __ 0

D 7 6 __ 1

E 9 7 __ 2

F 8 5 __ 3

G 5 4 __ 1

H 9 4 __5

I 7 4 ___3

The mean of difference, MD ;

MD = Σd/ n = (1+2+0+1+2+3+1+5+3) / 9 = 18 / 9 = 2

The sum of square, SS ;

(1 - 2)^2 + (2 - 2)^2 + (0 - 2)^2 + (1 - 2)^2 + (2 - 2)^2 + (3 - 2)^2 + (1 - 2)^2 + (5 - 2)^2 + (3 - 2)^2 = 18

Sample variance, S² = SS/(N-1) = 18 / (9 - 1) = 18 / 8 = 2.25

Sample standard deviation, S = √Variance = √2.25 = 1.5

Standard Error, S.E = S / √n = 1.5 / √9 = 0.5

Test statistic : MD / S.E = 2 / 0.5 = 4

We test at α = 0.05 since no α - value is stated in the question.

Critical value at 0.05, df = 8 ;

Critical value = 2.306

Since; Test statistic > Critical value, then result is significant at α = 0.05

You might be interested in
2x+4y=1<br> 3x-5y=7 <br> solve the simultaneous equations
WITCHER [35]

Answer:

y= -1/2

x=3/2

Step-by-step explanation:

first isolate x

2x+4y=1

2x=1-4y

x=(1-4y)/2

subsitute it in the second equation

look at the pic

4 0
3 years ago
Antwon makes hot chocolate by mixing 2 cups of milk with 5 tablespoons of cocoa.
Yuki888 [10]

Answer:

2.5 tablespoons of cocoa

Step-by-step explanation:

if 2 cups of milk is originally used then you use 1 well 2 divided by 2 equals 1 and 5 divided by 2 equals 2.5 so you would use 2.5 tablespoons of cocoa

6 0
3 years ago
Read 2 more answers
Select "Rational" or "Irrational" to classify each number.
xenn [34]

Answer:

rational rational irrational

Step-by-step explanation:

6 0
3 years ago
What is the value of x?<br><br><br><br> Enter your answer in the box.<br><br> x =
aniked [119]

Answer: X= 68

Just took the test

7 0
3 years ago
Help me ASAP please<br>Solve for x: 2/5 (x-4) = 2x.<br>-8 <br>-1/2 <br>1 <br>-1​
kicyunya [14]

Answer: X= -1

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • Twice the sum of -2 and a number is the same as the number decreased by 5/2.<br><br>The equation is
    11·1 answer
  • Identify the slope and y-intercept of the line 8x+2y=6
    7·1 answer
  • Find m∠OLM?????????????
    9·1 answer
  • Find the distance between Rockville and San Jose if they are in apart on a map with a scale of 2in:
    14·1 answer
  • 42 = 7r<br> Answer the question.
    12·2 answers
  • If a polygon has 189 diagonals how many sides does the polygon have ?
    12·2 answers
  • What is the area of the square given the side length 20.5in
    12·2 answers
  • What type of number is 24−16i? Choose all that apply. Group of answer choices Imaginary Complex Real
    9·1 answer
  • In the diagram, the circle will be dilated by a scale factor of 3 about the origin. The points C, A, and B map to C', A', and B'
    11·1 answer
  • Nine seconds elapsed from the time Mark saw the lightning until he heard the thunder. The lightning was about how many kilometer
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!