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
madam [21]
3 years ago
9

Marcus wants to know if students at his school like to sing in the shower. He polled 40 students who were not part of the school

choir. He found that 11 of the surveyed students enjoy singing in the shower. Is there a sampling bias in the situation above? A. No. Marcus selected a random, unbiased sample for his study. B. Yes. Marcus created bias by only polling 40 students. C. Yes. Marcus created bias by excluding students who are in the choir. D. There is not enough information to determine if Marcus selected a biased sample.
Mathematics
1 answer:
telo118 [61]3 years ago
5 0

Answer:

C

Step-by-step explanation:

You might be interested in
Answer this question plz thanks
Marina86 [1]

Answer:

  • Option A

Step-by-step explanation:

The area outside of the semicircle is the difference of the areas of the rectangle and the semicircle.

<u>Area of rectangle:</u>

  • A₁ = w(w + 5) = w² + 5w

<u>Area of the semicircle:</u>

  • A₂ = 1/2*πd²/4 = 1/8*πw²

<u>The area we are looking for is:</u>

  • A = A₁ - A₂
  • A = w² + 5w - 1/8πw²

Correct choice is A

5 0
3 years ago
Please answer all 3 questions
blsea [12.9K]

Answer:

  • x = 30°
  • DB = 26
  • AD = BC = AB = DC = 7

Step-by-step explanation:

  • <em>Diagonals of a square are congruent and perpendicular and bisect each other</em>
<h3>Q4</h3>

m∠AEB = 3x

m∠AEB = 90°

  • 3x = 90° ⇒ x = 30°
<h3>Q5</h3>

AE = 3x - 2

EC = 2x + 3

  • AE = EC
  • 3x - 2 = 2x + 3
  • 3x - 2x = 3 + 2
  • x = 5

DB = EC = 2(AE) = 2(3*5 - 2) = 2(13) = 26

<h3>Q6</h3>

<u>AD and BC are the sides, which are equal</u>

  • 2x - 1 = 5x - 13
  • 5x - 2x = 13 - 1
  • 3x = 12
  • x = 4

AD = BC = AB = DC =  2*4 - 1 = 7

7 0
3 years ago
Read 2 more answers
Which number is prime?<br> 85<br> 49<br> 70<br> 31
Citrus2011 [14]

Answer: 31 is a prime number because only 1 times itself equals 31. no other two factors equal 31 as a product.

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Function 2 x y 2 11 3 14 4 17 5 20 Consider the two functions. Which statement is true?
ad-work [718]

If Log x (1 / 8) = - 3 / 2, then x is equal to 

x- 3 / 2 = 1 / 8 


The above equation may be rewritten as 

x<span> - 3 / 2</span> = 1 / 23 = 2-3

(√x)-3 = 2-3


√x = 2 or x = 4 

5 0
4 years ago
Carlos graphs the equations y = 0.5x^2 + 3 and y = –4x^2 + 24x – 35 and generates the graph below. Which conclusion is supported
alexira [117]
 A is the correct answer because the parabolas never touch.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Paulo had 2 1/4 feet of red twine. he had 1 5/12 feet of blue twine. he used some twine for a craft. he has 1 11/12 feet of twin
    15·2 answers
  • What is one third of 27 over 48
    6·1 answer
  • Could I get all these questions answered?
    5·1 answer
  • Can someone help me please
    7·1 answer
  • Look at triangle ABC. What is the length of side AB of the triangle? Image down below :)
    10·2 answers
  • What is the slope of the line in the graph?
    13·2 answers
  • Of the 50 US states four have names that start with the letter W? What percentage of the US states have names that start with th
    8·1 answer
  • Evaluate each of the following <br><br>205 x 195 ​
    11·2 answers
  • Plz help meeeeee fast plz
    14·1 answer
  • Divide 170 in the ratio 3.5 , 1.25 , 2.33 please show calculations.​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!