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sammy [17]
3 years ago
11

when a study is designed so that neither the subjects nor the experimenters know which subjects are in the treatment group and w

hich ones are in the control group, the study is called a ____ experiment.
Mathematics
2 answers:
Nata [24]3 years ago
5 0
(taken from a source)

<span>double blind
</span>
Hope this helped!

:)
Greeley [361]3 years ago
3 0

Answer:double-blind (APEX)

Step-by-step explanation:

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Divide 54 into two parts so that four times the greater equals five time the less​
LUCKY_DIMON [66]
Let the both the parts be 'x' and 'y'
x>y
We know that 4x = 5y
so x = 5y/4
x + y = 54
Replacing x we get
(5y/4) + y = 54
(5y +4y)/4 = 54
9y = 216
y = 24
Replacing y in ' x+y = 54'
we get x = 30

Hence the larger part is 30 whereas the smaller part is 24
5 0
3 years ago
Brian, Alex &amp; Colin share some money in the ratio 1:9:3.
fiasKO [112]

Answer:

Step-by-step explanation:

1:9:3

brian gets x

alex gets 9x

colin gets 3x

Brian and colin receive 40

x + 3x = 40

x = 10

alex gets 9x = £90

3 0
3 years ago
221 febrero 2021
DIA [1.3K]

Answer:

uhhh i would love to help but i cant speak that language

3 0
3 years ago
Please help ASAP and explain the answer, thank you
jonny [76]

Answer:

Step-by-step explanation:

1) x² - 8x + 5 = 0

2) No subtract 5 from both sides

x² - 8x + 5 - 5 = 0 - 5

x² - 8x  = -5

3) Now find (8/2) = 4. Add 4² = 16 to both sides

x² - 8x + 16 = -5 + 16

x² - 8x + 16 = 11

4) (x - 4)²  = 11

5) Take square root both sides

x - 4 = ±√11

x = 4 ±√11

6 0
3 years ago
Each of students reported the number of movies they saw in the past year. Here is what they reported. 17,19,10,4,16,20​
lukranit [14]

Answer:

14.3

Step-by-step explanation:

What you would do is add all 6 numbers together. After finding the sum, divide by 6. The 6 represents the amount of numbers in the data set. So you would find 86/6 and get 14.3333. That would be rounded to 14.3. Hope this helped!

8 0
3 years ago
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