A researcher wants to know if eating a mint affects whether people can distinguish between two popular orange juice brands. To conduct an experiment, the researcher places 50 participants in two groups. The treatment group will eat a mint before drinking a juice, while the control group will not eat a mint before drinking. Then the participants will guess the juice brand. To select the groups, the researcher labels each participant with a number and selects slips of paper labeled 1–50 from a bowl at random. The first 25 participants whose numbers are selected will be the treatment group, while the other 25 will be the control group.

The characteristics of the two groups

A should be roughly equivalent because both groups will have 25 participants.
B should be roughly equivalent because the participants were labeled and then randomly selected for the groups.
C might not be roughly equivalent because one group may contain people that drink more juice than the other group.
D might not be roughly equivalent because one group may contain more people that prefer a particular juice brand.

Answers

Answer 1

Answer:

D might not be roughly equivalent because one group may contain more people that prefer a particular juice brand.

Step-by-step explanation:

I hope it helps :)

Answer 2

Answer:

B. should be roughly equivalent because the participants were labeled and then randomly selected  for the groups

Step-by-step explanation:

Just passed the quiz


Related Questions

HELP IMMA DIE
find the inverse for each relation {(-5,1),(-5,-1)(-5,8)}
a. (8,-5) (1,-5) (-5.8)
b. (-5,1) (-5,-1) (-5,8)
c. (-1,5), (1.-5) (8,5)
d. (1,-5) (-1,-5), (8,-5)

Answers

Answer:

(5,-1)  (5,1) (5,-8)

Step-by-step explanation:

The end of a minute hand on a clock is 5.5 inches from the center. How far will the minute hand travel over three days

Answers

Answer:

Step-by-step explanation:

Given :

Radius, r = Length of hour hand = 5.5 inches

A complete cycle is traveled in 24 hours ;

C = 2πr

C = 2 * π * 5.5 = 34.557519 inches

In 3 days : It will travel 3 full cycles

3 * C = 3 * 34.557519 inches

= 103.672557 inches

A bridge being designed will cross the river at a right angle. The equation of the left bank of the river is j = 2x+8. The center of the bridge will pass through (0,2). What is the equation of the line representing the bridge?​

Answers

Answer:   y = (-1/2)x + 2

This is the same as y = -0.5x+2

==========================================================

Explanation:

Refer to the diagram below.

The blue line is the graph of y = 2x+8, which is the left bank of the river.

For now, ignore the y = (-1/2)x+2 in the diagram and pretend we don't know that just yet. The red line is the bridge and it's some linear equation in the form y = mx+b. We're told the bridge is perpendicular to the river, so the bridge must also be perpendicular to the riverbank.

The blue line has slope m = 2. Apply the negative reciprocal to this to end up with -1/2. This is the perpendicular slope, and the slope of the red line. Note how the two slopes (2 and -1/2) multiply to -1. Any two perpendicular lines will have their slopes multiply to -1, as long as neither line is vertical or horizontal.

Since we want the bridge to pass through (0,2), this must mean the y intercept is b = 2.

So with m = -1/2 and b = 2, we go from y = mx+b to y = (-1/2)x + 2 which is the equation of the bridge shown in red.

This is the same as y = -0.5x + 2 since -1/2 = -0.5

Fatimah wants to build a one-sample z interval to


estimate the proportion of students at her school who ate


breakfast every day last week with 90% confidence. She


takes a random sample of 75 students and finds that 20


ate breakfast every day last week.


What critical value z* should Fatimah use to construct


this confidence interval?


A) z* = 1.282


B) z* = 1.645


C) z* = 1.96


D) z* = 2.576

Answers

Answer:

B: z*=1.645

Step-by-step explanation:

Khan academy step by step

Answer: z*=1.645

Step-by-step explanation:

How did the artists of the Harlem Renaissance try to combat stereotypes and racism?

Answers

Answer:

I answered your other question but I do not know the answer to this one, sorry

Step-by-step explanation:

look up Harlem Renaissance website for information

A new pain reliever is advertised as being 97%

effective. To 3 decimal places, what is the

probability that the pain reliever will be effective

in 12 independent trials?

A. 0.116

B. 0.694

C. 0.970

D. 0.847

Answers

Answer:

B. 0.694

Step-by-step explanation:

Probability is the ratio of the number of possible outcome to the number of total outcome.

Given that the pain reliever is advertised as being 97%  effective, for it to be effective in 12 independent trials

= (97%) ^ 12

= 0.693842361

The is approximately 0.694 to 3 decimal places

Answer:

B. 0.694

Step-by-step explanation:

Hope this helps

i dont get this please help!

Answers

1. Divide it into a triangle and a rectangle
2. To solve the area of the rectangle which is (length times width) do 2x9 = 18
3. To solve the area of the triangle which is (length times width divided by 2) do 2x4/2 =4
4. Area = 18 + 4, 22 square units

I need help with this math problem

Answers

Answer:

tui kobic tor hada kobic furi

PLS HELP DUE TODAY,25 POINTS TO BRAINLIEST

Answers

Answer:

I think it’s H

Step-by-step explanation:

Answer:

The answer is H bacause it has the most number of colours

7. The daily cost of production in a video game factory is calculated using c(x) = 400 + 25x, where x is
the number of complete video games manufactured. Which set of numbers best defines the domain of c(x)?
(1) integers
(2)positive real numbers
(3) positive rational numbers
(4)whole numbers

Answers

Answer:

(4) whole numbers

Step-by-step explanation:

Given function:

c(x) = 400 + 25xwhere x is the number of complete video games.

The complete video games can be expressed as positive integers or whole numbers, so the domain is whole numbers.

Correct choice is (4)

Answer:

Whole Number

Explanation:

Domain : The set of all the input values (i.e. the value of x ) in the function is called domain

The daily cost of production in a video game factory is calculated using c(x) = 400 + 25x

Cost expression : C(x) = 400 + 25x

Cost expression : C(x) = 400 + 25x

As x defines the number of complete video, since number of video cannot be negative.

1) Integers : integers are the numbers which can be positive, negative or zero, but cannot be a fraction

As, number of videos cannot be negative

so, x cannot be any integers

So, Integers is not the domain

2) Positive real numbers : Real numbers are the numbers which include both rational and irrational numbers.

As the x represent the complete number of video games, thus, x cannot be irrational

Hence, Positive real numbers is not the domain

3) Positive Rational Number : a number is expressed in the form of p/q then it is a rational number

The number of videos are in the complete number, so a fraction cannot be a complete number, thus, rational number cannot be a domain.

4) Whole Number : Whole numbers include natural numbers that begin from 1 onwards

As Numbers of videos are the complete number, and they are always positive, which is the defination of whole number, Domain is whole number

can someone pls answer :/

Answers

Sorry I don’t know this question but do not open the link above!

WHAT ORDER DO THESE GO IN HELPPPPPP AII!?

Answers

Answer:

They are correct. :)

Step-by-step explanation:

Throughout the column of the phrase,
the Inequality is CORRECT, and for the last two switch them ! They are not in the correct order, this is the right answer

Please help me with this

Answers

9514 1404 393

Answer:

  Vertex: (-1, 4)

  Maximum: f(-1) = 4

  Increasing: (-∞, -1)

  Decreasing: (-1, ∞)

Step-by-step explanation:

The equation can be written in vertex form by "completing the square."

First factor out the leading coefficient from the x-terms.

  f(x) = -(x² +2x) +3

Then add the square of half the x-coefficient inside parentheses. Add the opposite of that amount outside parentheses.

  f(x) = -(x² +2x +1) +3 +1

Write in vertex form.

  f(x) = -(x +1)² +4 . . . . . . . compare to a(x -h)² +k

You can see that the vertex is (h, k) = (-1, 4), and that the vertical scale factor 'a' is negative. This means the vertex is the maximum and the parabola opens downward.

The function will be increasing to the left of the maximum, decreasing to its right.

__

Vertex: (-1, 4)

Maximum: f(-1) = 4

Increasing: (-∞, -1)

Decreasing: (-1, ∞)

Graph: see attached

What's 5m²+5m+9m+8m²-m²= plss​

Answers

Answer:

12m^2+14m

Step-by-step explanation:

The "^means exponet" Hope I made your day

:)

It is 26m hope you have a wonderful day.

13=d divided by 6

(solve for d, thanks!)

Answers

Answer:

78 = d

Step-by-step explanation:

13 = d/6

Multiply each side by 6

13*6 = d/6*6

78 = d

can you solve this for me please?​

Answers

Answer:

19: 106

20: 79

21: 70

Step-by-step explanation:

Circle upper left

The central angles all add up to 360 degrees

BC + CD + 148 = 360

But CD = BC

2BC + 148 = 360            Subtract 148 from both sides

2BC = 360 - 148             Combine

2BC = 212                       Divide by 2

BC = 106

20

3 of the 5 arcs are marked as being equal.

Let each of them be called  = x

3x + 41 + 82 = 360          Combine

3x + 123  = 360                Subtract 123 from Both sides.

3x = 360 - 123

3x = 237

x = 237 / 3

x = 79

BC = 79

21

Unless DE and FC are diameters, this can't be solved. I will assume they are.

FB + 48 + 22 = 180.

FB + 70 = 180

FB = 110

===========

FC = FB + BD + DC

180 = 110 + 22 + DC

180 = 132 + DC

DC = 180 - 132

DC = 48

===========

BC = BD + DC

BC = 22 + 48

BC = 70

Jada completed her homework in 40 minutes. It took Andre 175% of Jada's time to complete the same homework. a) Who took longer to complete their homework? b) How long did it take Andre to complete his homework? Show your thinking on the tape diagram or another model.

add explanation too please

Answers

Answer: I think it took Andre 70 minutes

Step-by-step explanation:

Answer:

A.) Andre B.) 70 min

Step-by-step explanation:

A.) the key words are that it took andre 175% of Jada's time

B.)just take Jadars time 40 and multiply it by 175% or 1.75 as for the digram show Jadars as 100% and Andres as an extra 175% sorry i cant realy draw one right now

I need help pls help me with this i still dont know how to do it

Answers

Answer: u multiply them all together

Step-by-step explanation:nugggybi8ybggg8yiubgy8iibgu777777777b8u

Multiply them all together

A swimmer is training for a upcoming meet he swims 10 laps the first day each day he increases the number of laps he swims by 5 which best describes the function

Answers

10+5=15

He swam 15 laps the second day

Combine like terms: m + 11g - 7g + 7m

Answers

Answer:

4g+8m

Step-by-step explanation:

7m+m=8m 11g-7g=4g

(2.8×10⁸)⁴×(1.6×10⁶)÷2.1×10¹⁵,what's the answer in scientific notation correct to 3 significant figures?​

Answers

Answer:

it should be 9375 if to do all opf this work

Step-by-step explanation:

what is the answer to 15-2x=-7x= solve for x

Answers

Answer:

-3 is what I got

Step-by-step explanation:

Will mark brainliest

Answers

Answer:

A and C are the right answers

Step-by-step explanation:

Top row only

3 out of the 12 squares are shaded in therefore 3/12 which you can simplify into 1/4

Left column only

3 out of the 6 squares are shaded in therefore 3/6 which you can simplify into 1/2

I agree I think the correct answers are A and C

Please help I need help!!

Answers

Answer:

g x/ x=32

Step-by-step explanation:

Helloooooooooooooo

Triangle LMN is given. What is the value of cos(N)?

A) 4/5

B) 3/5

C) 3/4

D) 4/3

Answers

The answer is the question

2) Dave borrowed $475 from his credit union at a rate of 5.5% for 2 years. How much will he have to pay them back? *

Answers

Answer

$55

Step-by-step explanation:

Finance charge = Interest + Other costs

= $50 + 5

= $55

Ok this is the last one :)​

Answers

Answer:

12 53,9

Step-by-step explanation:

Answer:

12,53,9

Step-by-step explanation:

:PPP

what is an indulgence?​

Answers

Answer:

In the teaching of the Catholic Church, an indulgence is "a way to reduce the amount of punishment one has to undergo for sins".

Answer:

In the teaching of the Catholic Church, an indulgence is "a way to reduce the amount of punishment one has to undergo for sins"

Step-by-step explanation:

Indulgence is the action or fact of indulging. (in the Roman Catholic Church) a grant by the Pope of remission of the temporal punishment in purgatory still due for sins after absolution. The unrestricted sale of indulgences by pardoners was a widespread abuse during the later Middle Ages.

Indulgence sentence example. The indulgence accentuated the division between those who accepted and those who rejected it. German chocolates are my only indulgence . I went to a party last night, and there out of five ladies three were Roman Catholics and had the Pope's indulgence for doing woolwork on Sundays.

Help please, I don’t understand I tried everything.

Answers

Answer:

x=79

y=22.

............

Factor the trinomial 3x2 + 13x − 10 by grouping.

Answers

Answer:

(3x - 2) (x+5)

Step-by-step explanation:

3x^2 + 13 - 10

15× - 2 = -30

15+-2 = 13.....substitute 15x - 2x in place of 13x

3x^2+15x-2x-10

Factorise the first two values, thrn the second two

3x (x+5) - 2 (x+5)

Gathering the like terms together you eill be left with the following

(3x - 2) (x+5)

The factors of the trinomial 3x² + 13x - 10 is (3x-2)(x+5).

What is Factorization?

The breaking or decomposition of an entity (such as a number, a matrix, or a polynomial) into a product of another entity, or factors, whose multiplication results in the original number, matrix, etc., is known as factorization or factoring in mathematics.

we have,

Trinomial= 3x² + 13x - 10

Now, factories using splitting the middle term we get

3x² + 13x - 10

= 3x² + 15x - 2x - 10

= 3x( x +5) - 2(x+ 5)

= (3x - 2) (x+ 5)

So, the factors are (3x- 2(x+5)

Learn more about Factorization here:

https://brainly.com/question/30525927

#SPJ5

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