1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ratelena [41]
2 years ago
15

thirty-six students at a local middle school were randomly selected to participate in a taste test to select a new menu item for

a cafeteria. each student was given a choice between the macaroni and cheese and the cajun potato barrels. from the sample, 20 students selected macaroni and cheese and 16 students chose the cajun potato barrels. each student was asked to rate the item they chose on a scale from 1 (extremely dislike) to 9 (extremely like). which of the following prevents this study from being a well-designed experiment?
Mathematics
1 answer:
olchik [2.2K]2 years ago
3 0

The treatments (new menu item) were not randomly assigned to the students when 36 local middle school kids were chosen at random to take part.

Given that,

36 local middle school kids were chosen at random to take part in a taste test to choose a new menu item for a cafeteria. The Cajun potato barrels or the macaroni and cheese were the options offered to each pupil. 20 pupils chose the macaroni and cheese from the sampling, while 16 selected the Cajun potato barrels. On a scale from 1 (very dislike) to 9 (very much like), each student was asked to rank the object they selected (extremely like).

We have to find which of the following keeps this study from being an experiment with a sound design.

Each student was given the option of choosing either the macaroni and cheese or the Cajun potato barrels. Because the students' treatments were not distributed at random, those who preferred their cuisine chose it and gave it high marks. As a result, the study has selection bias.

Therefore, The treatments (new menu item) were not randomly assigned to the students when 36 local middle school kids were chosen at random to take part.

To learn more about student visit: brainly.com/question/24116760

#SPJ4

You might be interested in
Find the distance between C(2,4) and D (5. 7). Round to the nearest tenth, if necessary?<br>​
Nataly [62]

Answer:

<h3>The answer 4.2 units </h3>

Step-by-step explanation:

The distance between two points can be found by using the formula

d =  \sqrt{ ({x1 - x2})^{2} +  ({y1 - y2})^{2}  } \\

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

C(2,4) and D (5. 7)

We have

|CD|  =  \sqrt{ ({2 - 5})^{2}  +  ({4 - 7})^{2} }  \\  =  \sqrt{ ({ - 3})^{2}  + ( { - 3})^{2} }  \\  =  \sqrt{9 + 9}  \\  =  \sqrt{18}  \:  \:  \:  \:  \:  \\  = 3 \sqrt{2}  \:  \:  \:  \:  \:   \\  = 4.242640687...

We have the final answer as

<h3>4.2 units to the nearest tenth</h3>

Hope this helps you

4 0
4 years ago
Which expression can be used to find the quotient of 15 and 1/3
swat32

Which expression can be used to find the quotient of 15 and 1/3?

Solution

The quotient of "P" and "Q" is P/Q.

Therefore, the quotient expression of 15 and 1/3 is \frac{15}{\frac{1}{3} }

We can rewrite \frac{15}{\frac{1}{3} }  = 15*\frac{3}{1}

Note: If we have fraction in the divisor, we can flip the fraction and multiply with the dividend.

8 0
4 years ago
Read 2 more answers
*100 POINTS, WILL ALSO RECEIVE BRAINLIEST*
Diano4ka-milaya [45]

Part A: The x-intercept represents the maximum amount of profit the company makes depending on the price of erasers. The intervals would be the prices of the erasers, and they represent the correlation between sale and profit. For example, when each eraser costs $4, the company makes the max profit of $270.

Part B: The average rate of change would be $91.875 and the rate represents that, on average, for each dollar that the price of the eraser jumps, the profit jumps an average of $91.875.

Part C: The constraints of the domain would be things like how the price of the erasers cannot go less than $0 or above $8; 0 \leq x \leq 8.

5 0
2 years ago
Read 2 more answers
PLZ help now i need help n
vichka [17]

Answer:

7

Step-by-step explanation:

<em>hey there,</em>

<em />

< Here's how you do subtraction in fractions!

Make sure you find a least common denominator. Here, it's given to you to be 15. Usually, you can just multiply the two denominators but then it would be quite large at times, so you kind of just have to guess.

How did they go from  \frac{4}{5} x-\frac{1}{3} x  to \frac{?}{15} x?

Well, they used a least common denominator. 5 was multiplied by 3 to create 15, and 3 was multiplied by 5. But when you multiply the bottoms, you have to multiply the tops of the fraction too (the numerators).

So 4/5x was multiplied by 3. Denominator turned out to be 15, and now the top is 4x3 = 12. So the fraction is 12/15.

1/3x, on the other hand, was multiplied by 5. Denominator was also 15 so they're the same, and top is 1x5 = 5. So the fraction is 5/15.

Now, let's put them together.

\frac{12}{15}x-\frac{5}{15} x

When subtracting x, the x just stays there, so if it was 10x-4x, the answer would've been 6x. So now let's subtract!

12-5 = 7, and the denominator stays the same.

The answer is \frac{7}{15} x. So the numerator, or answer to your question, would be 7.

<u>Hope this helped! Feel free to ask anything else.</u>

5 0
3 years ago
Determine which of the transformations applied to Circle A could be used to prove Circle A is similar to Circle B. Select Yes or
Alenkinab [10]

Answer:

Step-by-step explanation:

Circle A has center (-2, 3)

Circle B has center (2, -2)

Circle A can be mapped to Circle A' by a translation:

Center         Rule of translation   New center

 (x, y)                 (x+4, y-5)

A(-2, 3)           A'(-2+4, 3-5)           A'(2, -2)

Circle A with radius r 1=2

Circle B with radius r 2=3

Scale factor= r 2/r 1 = 3/2 = 1.5

Since any two circles can be translated to have the same center, the dilation r2/r1 proves  the circles are similar where r1 and r2 are the radii of the circles.

The Circle A' and circle B both have center (2, -2). Then circle A' can be mapped to circle B by a dilation with center (2, -2) and a scale factor 3/2=1.5. So circle A and circle B are similar.

Therefore:  Translation right 4, down 5, and then a dilation of 1.5 is true.

                   Translation down 5, right 4, and then a dilation of 1.5 is true.

5 0
3 years ago
Other questions:
  • What is the slope of the line with the equation of y=-4x
    15·2 answers
  • Simplify 7 square root of 3 end root minus 4 square root of 6 end root plus square root of 48 end root minus square root of 54
    5·1 answer
  • Cheryl solved a problem: 84 ÷ 0.01 = 8,400.
    13·1 answer
  • I need help with this.
    6·2 answers
  • Elly poured 1/10 gallon of water into a empty bottle now it is 1/2 full how many cups of water does a full bottle hold?
    9·1 answer
  • Figure LMNO is a parallelogram.<br><br> What is the value of x?<br><br> 8<br> 10<br> 13<br> 20
    6·2 answers
  • PLZ HELP I WILL MARK YOU BRAINLYEST
    12·1 answer
  • PLEASE HELP WILL MARK BRAINLIEST <br><br> Find the area of the polygon show your work
    14·1 answer
  • If in an equation x = a negative number will there be no answer?
    12·1 answer
  • The school that Mary goes to is selling tickets to a fall musical. On the first day of ticket sales
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!