please answer:
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
please answer:
![Social networking is becoming more and more popular around the world. Pew Research Center used a survey of adults in several countries to determine the percentage of adults who use social networking sites (USA Today,
February 8, 2012). Assume that the results for surveys in Great Britain, Israel, Russia and United States are as follows.
Country
Use Social
Great
United
Networking sites
Britain
Israel
Russia
States
Yes
344
265
301
500
No
456
235
399
500
a. Conduct a hypothesis test to determine whether the proportion of adults using social networking sites equal for all four countries. Using a .05 level of significance. Use Table 12.4.
1. H, P, +P; - P, - P,
2. H, P -P; - P, = P.
3. H, P, + P; - P, +P.
Choose correct answer from above choice
2
Hạ: Not all population proportions are equal
The p-value is less than .01
what is your conclusion?
Conclude the population proportions are not all equal.
b. What are the sample proportions for each of the four countries? Round your answers to two decimal places.
Great Britain
0.43
Israel
0.53
Russia
0,43
United States
0.50
Which country has the largest proportion of adults using social networking sites?
Israel
c. Using a .05 level of significance, conduct multiple pairwise comparison tests among the four countries. Round Pi Pjand Diff to two decimal places. Round CV ij to four decimal places.
Comparison
Pi
Diff
n 2
CV ij
Diff > CV i
Pi
GB vs I
0.43
0.53 O
-0.10
800
500
0.0793
Yes
GB vs R
0.43
0.43
0.00
800
700
0.716
No
GB vs USA
0.43
0.5
-0.07
80
1000
0.0659
Yes
I vs R
0.53
0.43
0.10
500
700
0.0814
Yes
I vs USA
0.53
0.5
0.03
500
1000
0.0765
No
R vs USA
0.43
0.5
-0.07
700
1000
0.0685
Yes
O 9 9 9 9
9 9 9 9 9
9 9 9 9 9
O 9 O 9 9
9 99 9 9 9
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