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
Arturiano [62]
3 years ago
9

Alejandro wants to determine the average shoe size of all of the male students in his school. Which sample is likely to yield th

e most biased results? A.every tenth boy on the school’s phone list B.every member of the boys’ basketball team C.every boy in a randomly selected ninth-, tenth-, eleventh-, and twelfth-grade gym class D.every fifth boy who walks through the front doors of the school in the morning
Mathematics
2 answers:
Dimas [21]3 years ago
5 0
B. every member of the boys' basketball team 

because people who play basketball are generally taller which means they have bigger feet (most of the time) which doesn't accurately represent the average of the male student body. 
larisa86 [58]3 years ago
5 0
<h2>Answer:</h2>

Option: B is the correct answer.

B.   Every member of the boys’ basketball team

<h2>Step-by-step explanation:</h2>

We know that a biased sample is one in which the sample is not random.

There is some partiality or some preference of choosing a member of a sample.

A.) Every tenth boy on the school’s phone list.

As the choosing of the members of a sample is random i.e. each student has an equal probability of getting chosen.

             Hence, the sample is not biased.

C.)  Every boy in a randomly selected ninth-, tenth-, eleventh-, and twelfth-grade gym class.

Again this sample is random.

                     Hence, the option is incorrect.

D.) Every fifth boy who walks through the front doors of the school in the morning.

In this sample every person has an equal probability.

           Hence, the sample is not biased.

B.)  Every member of the boys’ basketball team.

This is a biased sample since the members in the basketball team have a big height and hence their foot size is also big. So, we can't obtain a good result for determining the average shoe size of all the male students in the school.

                  Hence, the sample is biased.

You might be interested in
-12xy^3z^5+15x^2z factor
azamat

Step-by-step explanation:

Kankam faktöriyel mi bu?Zormuş yaa nasıl cozcez acaba??

3 0
2 years ago
Read 2 more answers
You already know its another giveaway
nasty-shy [4]

Answer: yay thxs

Step-by-step explanation:

5 0
2 years ago
Solve for G<br><br> •1.00<br> •36.03<br> •90<br> •43.34<br> •46.66<br> •7.55
g100num [7]

Answer:42.98

Step-by-step explanation:

Hf=√(11^2-8^2)

Hf=√(121-64)

Hf=√(57)

Hf=7.5

11/sin90 =7.5/sinG

Sin90=1

11/1=7.5/sinG

Cross multiply

11 x sinG=7.5 x 1

11sinG=7.5

Divide both sides by 11

11sinG/11=7.5/11

sinG=0.6818

G=sin(inverse)(0.6818)

G=42.98

6 0
3 years ago
Consider the expression 3 * 2 ^ 2 &lt; 16 + 5 andalso 100 / 10 * 2 &gt; 15 - 3. which operation is performed second
BartSMP [9]
3 * 2 ^ 2 < 16 + 5
should be performed in the order PEMDAS (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction)/
Therefore, obtain
3 * 2 ^ 2 < 16 + 5
3 * 4 < 16 + 5           Exponentiation first
12 < 16 + 5               Multiplication second

Similarly, obtain
100 / 10 * 2 > 15 - 3
100 / 20 > 15 - 3      Multip[lication first
5 > 15 - 3                  Division second

5 0
3 years ago
Solve the following equations by factorisation method.Only factorisation not dharacharya.​
Luba_88 [7]

Hello, please consider the following.

When x_1 and x_2 are two roots, we can factorise as

ax^2+bx+c=a(x-x_1)(x-x_2)=a(x^2-(x_1+x_2)x+x_1x_2)=0

So for the first equation, we can say that the sum of the zeros is

\dfrac{a^2+b^2}{2}=\dfrac{a^2}{2}+\dfrac{b^2}{2}

and the product is

\dfrac{a^2b^2}{4}=\dfrac{a^2}{2}\dfrac{b^2}{2}

So we can factorise as below.

4x^2-2(a^2+b^2)x+a^2b^2=(2x-a^2)(2x-b^2)=0

And the solutions are

\boxed{\sf \n\bf  \ \dfrac{a^2}{2} \ \ and \ \ \dfrac{b^2}{2}}

For the second equation, we will complete the square and put the constant on the right side and take the root.

Let's do it!

9x^2-9(a+b)x+2a^2+5ab+2b^2=0\\\\9(x-\dfrac{a+b}{2})^2-9\dfrac{(a+b)^2}{4}+2a^2+5ab+2b^2=0\\\\9(x-\dfrac{a+b}{2})^2=\dfrac{9(a+b)^2-8a^2-20ab-8b^2}{4}\\\\9(x-\dfrac{a+b}{2})^2=\dfrac{9a^2+18ab+9b^2-8a^2-20ab-8b^2}{4}\\\\9(x-\dfrac{a+b}{2})^2=\dfrac{a^2+b^2-2ab}{4}=\dfrac{(a-b)^2}{4}\\\\(x-\dfrac{a+b}{2})^2=\dfrac{(a-b)^2}{2^2\cdot 3^2}

We take the root, and we find the two solutions

\begin{aligned}x_1&=\dfrac{a+b}{2}-\dfrac{a-b}{6}\\\\&=\dfrac{3a+3b-a+b}{6}\\\\&=\dfrac{2a+4b}{6}\\\\&\boxed{=\dfrac{a+2b}{3}}\end{aligned}

\begin{aligned}x_1&=\dfrac{a+b}{2}+\dfrac{a-b}{6}\\\\&=\dfrac{3a+3b+a-b}{6}\\\\&=\dfrac{4a+2b}{6}\\\\&\boxed{=\dfrac{2a+b}{3}}\end{aligned}

Thank you.

6 0
3 years ago
Other questions:
  • Kira made $391 for 17 hours of work. At the same rate, how many hours would she have to work to make $184 ?
    8·2 answers
  • I need help with this 8(y+4)=7y+38
    5·1 answer
  • PLSSSSS HELPPPPP MEEE I WILL GIVE BRIANLIEST!!
    11·1 answer
  • 2(x-5)=3(x+7) Show the process, please.
    11·2 answers
  • Do the graphs of the two equations parallel lines Y=4x - x and 2y = 4x + 5
    10·1 answer
  • What is the total cost of a bag chips that cost $0.99 with 7% sales tax?
    8·2 answers
  • 10 POINTS
    13·1 answer
  • 3x-2x+8=12; x=4 <br>Determine if the value of x is a solution to the equation<br>​
    10·1 answer
  • Band Trip
    12·1 answer
  • What is the formula of \underline{force}force​ in physics?<br>​​​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!