A swim instructor would like to test the effect of a new swim technique versus the standard technique for a group of 25 competitive swimmers.

The swim instructor divides the students by class (junior or senior), and then randomly allocates half of the 14 juniors and 5 of the 11 seniors to receive instruction on the new technique.

During swim practice, the instructor times the juniors as they race against each other to see if those who learned the new technique outperform their peers. The instructor does the same for the seniors.

At the end of practice, the instructor compares the average swim time for both juniors and seniors among those who did and did not use the new technique.

A) The instructor should place the 25 student names on slips of paper and place them in a hat. Twelve of the slips should be drawn out and those students should receive the instruction on the new technique.

B) The instructor should place the names of the 14 juniors on slips of paper and place them in one hat. The 11 seniors’ names should be placed on slips of paper and placed into a separate hat. The instructor should randomly select 7 juniors and 5 seniors to receive instruction on the new technique.

C) For each student, the instructor should flip a coin. If the coin lands on heads, the student will receive instruction on the new technique. If the coin lands on tails, the student will not receive instruction on the new technique.

D) The students should line up alphabetically and count off by 2s. Every student who gets a 1 will receive instruction on the new technique. Every student who gets a 2 will not receive instruction on the new technique.

Answers

Answer 1

Answer:

B on Edge 2021.

Step-by-step explanation:

BBBBBB

Answer 2

Answer:randomized block experimental design

Step-by-step explanation:

CORRECT ON EDGE 2022


Related Questions

Johanna used tiles to build a rectangular array with an area of 54 W. All the possible dimensions of the array

Answers

Answer:

4

Step-by-step explanation:

To Obtian the possible dimensions of the array :

List out the factirs of 54 and use a pair of each in multiplication to obtain 54 ; Theb number of multiplication pairs obtained is the number of possible dimensions of the array :

Factors of 54 : 1, 2, 3, 6, 9, 18, 27, 54

Muliplication pairs :

(6 * 9) = 54

(18 * 3) = 54

(27 * 2) = 54

(54 * 1) = 54

Hence, there are 4 possible dimensions of the array

The graph of f(x) = -2^2 was transformed to create g(x) = -(x+3)^2. Which of these describes the transformation from the graph of f to the graph of g

Answers

I’m assuming you meant -2x^2 so It would be shifted to the left 3 it would be compressed from having 2 to 1.

A circle has a radius of 8 centimeters. The measure of the arc of the
shaded region is 72º. Which is closest to the area of the shaded section
of the circle?
1. 40.2 2. 160 3. 50.3 4. 10.1 ???

Answers

Answer: 10.1

Step-by-step explanation:

Substitution.
-3x - 2y = -12
y = 5x - 7

Answers

Answer:

-3x-2(5x-7)=-12

-3x-10x+14=-12

-13x+14=-12

-13x=-16

x=2

need help I will give brainiest

Answers

Answer: 97

Step-by-step explanation:

10+3+3+33+33+15

I need help answering

Answers

don’t mind me just getting points, csc(15/20)

Answer:

It is the fourth choice

Step-by-step explanation:

[tex] \csc(a) = \frac{1}{ \sin(a) } \\ \sin(a) = \frac{15}{25} \\ \\ \csc(a) = \frac{1}{ \frac{15}{25} } \\ \\ \csc(a) = \frac{25}{15} [/tex]

So no one of the above

what is the product of the polynomials below? (8x^2-4x-8)(2x^2+3x+2)

Answers


16x^4 +16x^3 - 12x^2 - 32x - 16

Evaluate the following: 18 + 3 |6 - 25| - 11

Answers

Answer:

29

Step-by-step explanation:

18+3|6-25|-11

21+19-11

29

Pls solve will give brainlest

Answers

Answer:

x=65

Step-by-step explanation:

That is the answer.

Find the total surface.
A)75.4
B)100.5
C)88
D)44​

Answers

The answer is d 44 i dont know how to show work

The Answer would be C) 88

y
3
2
1
-4
-3 -2
-1
1
2
2
3
4
-1+
-2+
-3+
-4
What is the slope of the line?

Answers

Answer:

1/2

Step-by-step explanation:

y = mx + b is slope intercept form.

b = y intercept. where the line first passes through on the y axis

that number is 3.

y = mx + 3.

to find M (slope) you have to do RISE / RUN.

Run is going left or right from a point

Rise is going up or down from a point.

To make sure you find the slope, when you Rise and Run, it has to hit another point on the graph.

From the y - intercept 3, RISE (go up) 1 and RUN (go left) 2.

So, the slope is 1/2.

Please help if you know the answer please

Answers

Answer:

1 3/7 or 10/7

Step-by-step explanation:

2 is also known as 14/7. 14/7 - 4/7 is equal to 10/7 or 1 3/7.

Do this and I’ll pay u I need help

Answers

Answer:

69

"bring me my money"

Step-by-step explanation:

find the solution to the system of equations

Answers

Answer:

(-2,0)

Step-by-step explanation:

The solution is where the two graphs intersect.

HELP ASAP!!!!! BRAINLIEST AWARD!!!!!!
Choose one of the theorems about chords of a circle and state it using your own words.
Create a problem about chords that uses the theorem that you explained. Solve the problem.

examples below:

Answers

1.The Chord Intersection Theorem:

If 2 chords of a circle are AB and CD and they intersect at E, then

AE * EB = CE * ED.

Problem.

Two Chords AB and CD intersect  at E.  If AE =  2cm , EB = 4 and CE = 2.5 cm, find the length of ED.

By the above theorem : 2 * 4 = 2.5 * ED

ED = (2 * 4) / 2.5

= 3.2 cm.

2.1. A given chord on a circle is perpendicular to a radius through its center, and it is at a distance less that the radius of the circle.

2. A circle of center O has a radius of 13 units. If a chord AB of 10 units is drawn at a distance, d, to the center of the circle, determine the value of d.

3. From question 2, the radius = 13 units, length of chord = 10 units and distance of chord to center of the circle is d.

A radius that meet the chord at center C, and divides it into two equal parts.

So that;

AC = CB = 5 units

Applying Pythagoras theorem to ΔOCB,

OC = d, CB = 5 units and OB = 13 units

=  +  

169 = 25 +  

169 - 25 =  

144 =  

⇒ d =  

      = 12 units

Therefore, the chord is at a distance of 12 units to the center of the circle


Write the word sentence as an inequality The quotient of a number y and -3.6 is less than 6.5.

Answers

Answer:

the quotient of a number y and negative three point six is less than six point five.

You randomly draw a marble from a bag of marbles that contains 7 blue marbles, 2 green marbles, and I red
marble
NO LINKS!!

Answers

What’s the question?

At which value in the domain does f(x) = 0?
Ty
10
8+
6
4
2
-1
3
-10
--3

Answers

120 is the answer u neee to multy 7and 99

this is my question here

Answers

Answer:

The greatest number of cycling outfits that Mr. Trager can buy would be 2.

Step-by-step explanation:

To answer the question, you need to determine the amount Mr. Traeger has left to spend, then find the maximum number of outfits that will cost less than that remaining amount.

Spent so far:

... 273.98 + 3×7.23 +42.36 = 338.03

Remaining available funds:

... 500.00 -338.03 = 161.97

The cycling outfits are about $80 (slightly less), and this amount is about $160 (slightly more), which is 2 × $80.

Mr. Traeger can buy two (2) cycling outfits with the remaining money.

_____

The remaining money is 161.97/78.12 = 2.0733 times the cost of a cycling outfit. We're sure he has no interest in purchasing a fraction of an outfit, so he can afford to buy 2 outfits.

what function represents the same relationship
I know it's not C though​

Answers

The correct answer is B

find the product

(n+8)(m-2)

Answers

Answer:

nm - 2n + 8m - 16

Step-by-step explanation:

(n + 8) (m - 2)

nm - 2n + 8m - 16

Use foil method

Answer: nm - 2n + 8m - 16

What is the area of this figure? Enter your answer in the box.​

Answers

Answer:

58.5

Step-by-step explanation:

3x11=33

3x3=9

3x11/2=16.5

16.5+9=25.5

25.5+33=58.5

Thanks we have same question

A(n) __value is any 2-value of a function that makes the y-value undefined.
1. excluded
2. discontinuous
3. quadratic
4. rational​

Answers

Answer:

rational

Step-by-step explanation:

its so because they fit equaly

Martin recorded the low temperatures at his house for one week. The temperatures are shown below -7, -3, four, one, -2, -8, seven approximately what was the average low temperature for the week?

Answers

5,28-(x4-3,,,,,,,,,,,,,,,,,

PLEASE HELP ON THIS TOO! I need major help! Please explain it the best you can bc I rlly need help :(

Answers

Step-by-step explanation:

Use the rotation rule,

90 degree clockwise rule is

[tex](xy) = ( y)( - x)[/tex]

Plot the points of the pre image

[tex]( - 3)(0)[/tex]

[tex]( - 2)( - 4)[/tex]

[tex]( - 1)( - 2)[/tex]

Use the rule that turns into,

[tex](0)(3)[/tex]

[tex]( - 4)(2)[/tex]

[tex]( - 2)(1)[/tex]

Plot the new points. in the coordinates above.

!!!PLEASE ANSWER QUICK!!!
Student Harrison Anita Juan Krista

Description Harrison shared his video with 7 friends. His friends continued to share it, doubling the number of viewers each day. Anita shared her photo with 41 followers. Each of them shared it with 2 friends, doubling the number of viewers each day. Juan shared his post with 4 friends, who each shared it with 4 more friends. They continued sharing at the same rate. Krista shared her photo with 6 friends, who each shared it with 3 friends. This pattern continued.

Social Media Shares f(x) = 7(2)x

Day

0

1

2

Viewers

41

82

164 Juan shared his post with 4 friends, who each shared it with 4 more friends. They continued sharing at the same rate. f(x) = 6(3)x

State which two students you are studying so your instructor knows for whom each partner is responsible.

Provide an exponential function representing Anita's social media shares.

Provide an exponential function representing Juan's social media shares.

Using the functions for each student, predict how many shares each student's post will have received on Day 3 and then on Day 10. Justify your answers.

Based on your results, which student's post travels the fastest? How is this shown in the equation form of the functions?

If you had to choose, would you prefer a post with fewer friends initially but more shares or more friends initially but fewer shares? Does your partner agree or disagree? Can you think of reasons why more or fewer shares are preferable? Justify your answer with your calculations from previous questions.

Answers

Answer:

Anita: f(x)=42(2)^x. 3. Juan: f(x)=3^x. 4. Harrison: f(x)=5(2)^x = f(3)=5(2)^3=5(8)=40

Step-by-step explanation:

Answer:

Step-by-step explanation:

 

Make sure you are dealing with the same values in your directions.

1. State which two students you are studying so your instructor knows for whom each partner is responsible.  Harrison and Anita

2. Provide an exponential function representing Anita's social media shares.

f(x)= 41(2)^x

3. Provide an exponential function representing Juan's social media shares.

f(x)= 4^x

4. Using the functions for each student, predict how many shares each student's post will have received on Day 3 and then on Day 10. Justify your answers.

Harrison

f(x) =7(2)^x = f(3) = 7(2)^3 = 7(8) = 56

f(x) =7(2)^10 = f(10) = 7(2)^10 = 7(1024) = 7,168

Anita

f(x)= 41(2)^x = f(3) = 41(2)^3 = 41(8) = 328

f(x) =41(2)^10 = f(10) = 41(2)^10 = 41(1024) = 41,984

5. Based on your results, which student's post travels the fastest? How is this shown in the equation form of the functions?

Between students Harrison and Anita the post that travels the fastest was Anita at 41,984 posts.  

f(x) = 41(2)^10  

6. If you had to choose, would you prefer a post with fewer friends initially but more shares or more friends initially but fewer shares? Does your partner agree or disagree? Can you think of reasons why more or fewer shares are preferable? Justify your answer with your calculations from previous questions.

Fewer friends initially but more shares.  If you want a post to go viral you want more shares with more people. The post was viewed 41,984 times in 10 days.

This represents sharing with 2 friends for 3 days.

f(x)= 41(2)^x = f(3) = 41(2)^3 = 41(8) = 328

This represents sharing with 2 friends for 10 days.

f(x) =41(2)^10 = f(10) = 41(2)^10 = 41(1024) = 41,984

What is the approximate value of
3

35
?

Answers

Answer:

17.7

Step-by-step explanation:

Use a calculator.  Enter 3 and then √35.  The calculator should return

17.748.  Round this off to 17.7.

Answer:

17. 7 is the answer.

Step-by-step explanation:

#CarryOnLearning

Jordan bought StartFraction 9 Over 16 EndFraction of a pound of sunflower seeds and divided them evenly into 9 snack bags for his lunch. What is the weight of sunflower seeds in each snack bag?
StartFraction 1 Over 16 EndFraction of a pound
StartFraction 1 Over 9 EndFraction of a pound
StartFraction 16 Over 81 EndFraction of a pound
StartFraction 81 Over 16 EndFraction pounds

Answers

Answer:

StartFraction 1 Over 16 EndFraction of a pound

Step-by-step explanation:

Total pounds of sunflower seeds Jordan bought = 9/16 of a pound

Number of snack bags for his lunch = 9

What is the weight of sunflower seeds in each snack bag?

Weight of sunflower seeds in each snack bag = Total pounds of sunflower seeds Jordan bought / Number of snack bags for his lunch

= 9/16 ÷ 9

= 9/16 × 1/9

= (9*1) / (16*9)

= 9 / 144

= 1/16

Weight of sunflower seeds in each snack bag = 1/16 of a pound

Answer:

1/16 of a pound aka A is the correct answer.

Step-by-step explanation:

AOC and BOD are diameters of a circle, centre O. Angles BAD and CDA are 90°. Prove that triangle AND and triangle DCA are congruent


Please help me, i have a test tomorrow and i am confused ⭐️

Answers

Answer:

By using SAS which stands for Side, Angle, Side.

Step-by-step explanation:

This means that if we have two angles and side measures that are equal to the corresponding angles and side measures of the other triangle then they are congruent.

A right triangle is shown below.
Х
4
8.5
What is the value of x? Enter your value as a decimal rounded to the nearest tenth,

Answers

Answer: x = 7.5

Step-by-step explanation:

Use the Pythagorean Theorem ( [tex]a^{2}+b^{2} =c^{2}[/tex] )

The longest side is c = the hypotenuse, and a and b = the other sides of the triangle.

a = 4                              First: [tex]4^{2}+x^{2}=8.5^{2}[/tex]

b = x                         Second: [tex]16+x^{2}=72.25[/tex]  

c = 8.5                          Third: [tex]x^{2}=56.25[/tex]

                                  Fourth: [tex]x=\sqrt{56.25}[/tex]

                                      Fifth: x = 7.5

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