Answer:
The study uses random sampling
The study uses blocking to reduce variability from known factors
Step-by-step explanation:
Correct on Plato/Edmentum
Answer:
$15.50
Step-by-step explanation:
The total she spent was $28.50 ($18.00 purse and $10.50 wallet).
The amount she would have spent is $44 ($30+$14).
$44 - $28.50= $15.50 was saved.
Answer:
See Explanation
Step-by-step explanation:
Required
Write three equivalent ratios
<em>To solve these questions, we do the following:</em>
<em>Whatever is being applied to a part of the ratio must be done on the other part</em>
<em></em>
Solving (9):

Multiply through by 2

Multiply through by 3

Multiply through by 5

<em>Hence, the equivalents are: </em>
<em></em>
Solving (10):
Ratio = 1.5 to 3.5
Multiply by 2


Multiply by 3


Multiply by 4


<em>Hence, the equivalents are: </em><em>3 to 7, 4.5 to 10.5 and 6 to 14</em>
Solving (11):
Ratio = 6.25 to 1.25
Divide by 5


Multiply by 2


Multiply by 4


<em>Hence, the equivalents are: </em><em>1.25 to 0.25, 12.5 to 2.5 and 25 to 5</em>
Solving (12):

Multiply by 2


Multiply by 4


Multiply by 6


<em>Hence, the equivalents are: 6:7, 12:14 and 18:21</em>
Solving (13)

Convert mixed fraction to improper fraction

Multiply by 2


Multiply by 3


Multiply by 12


Hence, the equivalents are: 10/3:5/2, 5 : 15/4, and 20:15
Answer: -0.83
Step-by-step explanation:
A correlation coefficient(r) is used to determine the strength and direction of the relationship between two variables.
-1 ≤ r ≤1
For downward trend r is negative.
For strong correlation r should be closer to 1 or -1.
From the given correlation coefficients -0.83 is both negative and closer to -1.
Hence, a correlation coefficient represents the strongest downward trend in a data set = -0.83