17. Generally speaking, which of the following is necessary to conduct either a single-blind or double-blind study?

O Control group

Blocking

Placebo

O Association​

Answers

Answer 1
Control group.

A single or double blind study means that either the participants or the researchers or both does not know who is in the control group and who is in the experimental group. This, there has to be a control group

Related Questions

At 9 a.m., Jessica started riding on the Red Mountain Parkway at the 40-mile marker.
At the same time, Kate started riding on the Red Mountain Parkway at the 10-mile
marker. Jessica rides her motorcycle at a rate of 30 miles per hour. Kate rides her
motorcycle at a rate of 40 miles per hour. If they are both riding in the same direction,
which graph shows the number of hours after 9 a.m. when Jessica and Kate will be in
the same position on the parkway?

Answers

Answer:

See below

Step-by-step explanation:

Start time = 9 A.M.

JessicaStart point- 40 milesSpeed - 30 mph

Equation:

y = 40 + 30xKateStart point- 10 milesSpeed - 40 mph

Equation:

y = 10 + 40x

Note. There is no graph but see the attached. It should be similar graph for this case

The will meet after 3 hours at 130 miles mark

Solving the system of equations we get:

40+30x = 10 + 40x10x = 30x = 3

And y is:

y = 40+3*30 = 130

(3, 130) is the intersection of lines

Since it takes 3 hours for Jessica and Kate, it happens at 12 A.M.

helpppppppppppppppppppppppppppppppp

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Answers

Answer:

12.5%

Step-by-step explanation:

60
70
50
Find angle x

Answers

Answer:

Where is the pictureeeeeeee

Answer:

picture??

Step-by-step explanation:

what is the domain of the function y= cube root x-1

Answers

The domain of the expression is all real number except where the expressions is underlined .But you should have a picture so I can see what are the answer choices

Answer:

A on edge

Step-by-step explanation:

just took the test

What is the answer to: −12x−16≥32

Answers

Answer:

hello there mate

Step-by-step explanation:

Answer:

x≤−4

Step-by-step explanation:

if you want me to explain how I got the answer reply yes

If Sally had six balls and Mark had seven how many balls did he have in all

Answers

Step-by-step explanation:

he had 7 balls

hope he healthy that's a lot of balls to have

Answer:

13 i think 6+7 = 13 yeh yeh

A ball is dropped from a height of 9 meters. On each bounce, it rises to 35% of its previous height.

When it hits the ground for the sixth time, how far has it traveled?


Round your answer to the nearest hundredth.

Answers

I believe it’s .006 because 9 times .35 6 times is .00579054

Help plsss I have 10 minutes!!!!20 points!!!!

Answers

Answer:

its d

Step-by-step explanation:

it’s d the answer is d

4 + √2 divided by 3 - 5√2

Answers

Answer:

-2.59966329107

Step-by-step explanation:

Please help! Question posted above ^

Answers

Answer:

( x^2 - 6 )^2

Step-by-step explanation:

x^4 -12x^2 +36Find one factorFactor by grouping(x^2 - 6x) (x^2 - 6x)

*solution* ( x^2 - 6 )^2

PLEASE HELP THIS IS TIMED!!!! I WILL GIVE BRAINLIESTTTTTT

The table below represents a linear function f(x) and the equation represents a function g(x):

x f(x)
−1 −3
0 0
1 3
g(x)

g(x) = 7x + 2


Part A: Write a sentence to compare the slope of the two functions and show the steps you used to determine the slope of f(x) and g(x). (6 points)

Part B: Which function has a greater y-intercept? Justify your answer. (4 points)

(10 points)

Answers

Answer

Given: Sorry the images are at the bottom.

To find:

Part A: Write a sentence to compare the slope of the two functions and show the steps you used to determine the slope of f(x) and g(x).

Part B: Which function has a greater y-intercept? Justify your answer.

Solution:

On inspection of values of x and f(x) it is clear that f(x) is a linear function

i.e.

1)Slope of f(x) and y-intercept of f(x):

Convert the function in slope intercept form and calculate the slope.

Slope intercept form:

Here,

Slope of f(x)=1,

y-intercept of f(x)=(0,0)

2) Slope and y-intercept of g(x):

Slope of g(x)=7

Y-INTERCEPT of g(x) =(0,2)

Part A:

Slope of f(x) is 1 and slope of g(x) is 7.

Part B:

g(x) has a greater y-intercept.

Hope it helps you.

One-third of Olivia's age, increased by 12, is equal to twice her age, decreased by 3. How old is Olivia?

Answers

Answer:

Olivia is 9 years old.

Step-by-step explanation:

1/3 of o (Olivia's age) increased by 12, is twice of o minus 3. The equation for this would be 1/3o + 12 = 2o - 3. (The left side could be o/3 as well.)

1/3o + 12 = 2o - 3

Subtract 2o from both sides

-5/3o + 12 = -3

Subtract 12 from both sides

-5/3o = -3 - 12

Subtract 12 from -3 to get -15

-5/3o = -15

Multiply both sides by -3/5, the reciprocal of -5/3

o = -15 (-3/5)

Express -15(-3/5) as a single fraction

o = -15 (-3)/5

Multiply -15 by -3 to get 45

o = 45/5

Divide 45 by 5 to get 9.

o = 9

To make sure this works, substitute 9 for o.

1/3(9) + 12 = 2(9) - 3

3 + 12 = 18 - 3

15 = 15

Both sides match each other, so o equals 9.

Olivia is 9 years old

Let the age of olivia be "x"

One-third of Olivia's age is expressed as 1/3x

If it is increased by 12, the expression becomes 1/3 x  + 12

Twice her age decreased by 3 is expressed as 2x - 3

Equate both expressions and find x

1/3x + 12 = 2x - 3

1/3x - 2x = -3-12

(x-6x)/3 = -15

-5x = -45

x = 9

Hence Olivia is 9 years old

Learn more on equations here; https://brainly.com/question/2972832

Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution.

Answers

Answer:

only one solution

Step-by-step explanation:

Complete question:

Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 2x − y = 2 3x + y = −6 one and only one solution infinitely many solutions no solution Find the solution, if one exists. (If there are infinitely many solutions, express x and y in terms of the parameter t. If there is no solution, enter NO SOLUTION.) (x, y) =

Given the expression

2x − y = 2 .... 1

3x + y = −6  ..... 2

We are to determine the number of solution the equation has:

Add equation 1 and 2

2x + 3x = 2 - 6

5x = -4

x = -4/5

Substitute x = -4/5 into 1

From 1: 2x − y = 2 .... 1

2(-4/5) - y = 2

-8/5 - y = -2

-y = -2+8/5

-y = -10+8/5

-y = -2/5

y = 2/5

Since the value of x and y are just 1 hence the system of equations has ine solution

List three different combinations of coins, each with a value of 30% of a dollar.​

Answers

Answer:

1. 3 dimes

2. 1 quarter and a nickel

3. 30 pennies

Step-by-step explanation:

i hope this is it and i hope this helped <3

Answer:

3 nickels, 1 quarter and 5 pennies, and 30 pennies

Step-by-step explanation:

30% of a dollar is 30 cents. those all equal 30 cents

if f(x)= x-5 then match the following ​

Answers

Answer:

one number is -6

two number is -5

3. -4

4. -3

5. 0

6. 3

-) Write 32 + 24 as a product of two factors using the GCF
and the distributive property.
32 + 24
?
+
?

Answers

Answer:

8 (4+3)

Step-by-step explanation:

32 + 24 as a product of two factors using the GCF is 8(4 + 3).

Greatest common factor (GCF)?

The greatest common factor (GCF) of two number is the largest number which can divide both the numbers completely.

Given,

The expression is 32 + 24 .

The greatest common factor of 24 and 32 can be found using the following method.

Common factors of 24 and 32 are:

2, 4, and 8

Out of all the common factors 8 is the largest number.

Therefore  greatest common factor of 24 and 32 is equal to 8.

Taking the GCF out we get:

                                       8(3 + 4)

Hence, 32 + 24 as a product of two factors using the GCF is 8(4 + 3).

To learn more about GCF visit:

https://brainly.com/question/11444998

#SPJ1

Bryan wants to buy a new pair of jeans. If the jeans were originally $45.00, but are on sale with a 20% discount, how much will Bryan have to pay for the jeans?

Answers

Answer:

20% of 45= 9 so you would subtract 9 from 45 getting you 39

Step-by-step explanation:

45-9=39 he would have to pay $39

A box weighs 3.2 pounds. The box contains packs of crayons, which each weigh .5 pounds. The total weight of the box and the crayons is 10.7 pounds. How many packs of crayons are in the box

Answers

Answer: 15 packs of crayons

4x−5 for x=10

Please, I really need the answer.

Answers

Answer:

4(10)-5=35

Step-by-step explanation:

4(10)=40-5=35

4(10) is the same as 4x10

So think about it like 4x10-5

I hope this helps ;}

find the slope thanks​

Answers

17) undefined slope/no slope
18) 1/4
19 -4/5
20) -1

the price of some medication was increased from $8 to $12. By what percentage was the price of the medicine increased ?​

Answers

I believe it’s 50% because you divide 8/2 and that’s 4, and 4+8=12

Marquis started at an elevation of 3000 feet and hiked down a mountain at a constant rate. His elevation decreased 500 feet per hour.
Graph the relationship between Marquis’ elevation and time as he hiked down the mountain.

Answers

Answer:

if u divide it then slop  it u will get your answer

Step-by-step explanation:

Which is the fraction for 33%

Answers

33% in fraction is 33/100.

Please mark as brainliest ~

1/3 is the answer, Yw

Please help this is for a grade and I need it answered soon

Answers

Answer:

option D

Step-by-step explanation:

5c(3c²)³

5c(27c^6)

135c^7

Below are four different advertisements at four different stores for the same jeans. JL Fashion Mart Tops, Bottoms, and More Boy's Jeans Regular Price: $16 Sale Price: 20% off each Boy's Jeans Regular Price: $27 Coupon: Buy 2, get 1 free Clothing Outlet We Sell Everything Boy's Jeans Regular Price: $20 Coupon: Buy 1, get 1 for $1 Boy's Jeans Regular Price: $25.99 Sale Price: Rebate of $5 each Mr. Marks is shopping for three pairs of jeans for his son. If he buys exactly 3 pairs of jeans, which store will give the greatest cost savings? A. JL Fashion Mart

Answers

Answer: JL Mart

Step-by-step explanation:

The equation for line g can be written as y = x + 5. Parallel to line g is line h, which passes through the point (-6, -4). What is the equation of line h? SHOW WORK PLEASE​

Answers

Answer:

y=x+2

Step-by-step explanation:

we know the slopes have to be equal because the lines are parallel, so the slope is 1, or written as x. plug the point given, (-6,-4), and the slope, 1, into the y=mx+b equation to find the y-intercept. then solve. then put the slope and y-intercept together for the equation of line h.

y=mx+b, m=1, x=-6, y=-4

-4=(1)(-6)+b

-4=-6+b

2=b

y=x+2

what fraction is equivalent to -3/2

Answers

Answer:

-1 1/2

Step-by-step explanation:

A bottle contains 24oz of liquid medication.If the average dose is 2/3oz. How many dose does the bottle contain

Answers

Answer:

36

Step-by-step explanation:

keep, flip, change...

24 ÷ [tex]\frac{2}{3}[/tex] would be the same as [tex]\frac{24}{1}[/tex] × [tex]\frac{3}{2}[/tex] which is equal to [tex]\frac{72}{2}[/tex] (36 if you simplify it)

The number of dose of 2/3oz of liquid medication does the bottle contain is 36.

What is the fraction number?

Fraction number is the number which is a part of a whole number. It is written with a numerator and denominator. Fraction number are written as,

[tex]\dfrac{a}{b}[/tex]

Here (a) is the numerator and (b) is the denominator.

A bottle contains 24oz of liquid medication and the average dose is 2/3oz.

Let suppose the number of dose does the bottle contain is n. There is total 24oz of liquid medication in the bottol.

As the average dose is 2/3oz. Thus the number of dose in the bottle which has 24oz of liquid medication is,

[tex]n=24\div\dfrac{2}{3}\\n=24\times\dfrac{3}{2}\\n=36[/tex]

Thus, the number of dose of 2/3oz of liquid medication does the bottle contain is 36.

Learn more about the fraction number here:

https://brainly.com/question/78672

Your bill at pizza hut is $30. You leave 20% tip. Whats is the amount of tip?

Answers

You gave $30.

[$30 * 0.20] (tip % amount) = $6.

You left $6 in tips.

Marcus can drive his boat 36 miles down the river in 3 hours but takes 4 hours to return upstream. Find the rate of the boat
in still water and the rate of the current.

Answers

Answer:

With river 12 miles per hour

Against river 9 miles per hour

wv = water velocity  vsw = boat velocity in still water

vsw +wv =  12 mph

vsw -wv = 9 mph

2 * vsw = 21 mph

boat velocity in still water = 10.5

Since vsw + wv = 12 then

water velocity = 1.5 mph

Step-by-step explanation:

Answer:

speed in still water: 10.5 Current: 1.5

Step-by-step explanation:

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