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
SOVA2 [1]
3 years ago
15

20 POINTS!!! Mr. Moore is installing new work benches in the wood shop. He wants the height of the benches to be best for studen

ts standing and working on projects. He decides to use the mean height of the students in the school as a guide. The school has 6th, 7th, and 8th grade students. Rather than using the heights of all the students in the school, he decides to take a sample of students.
A: Suppose Mr. Moore decides to use 20 seventh graders as the sample. Is this sample a random sample? Explain your reasoning.

B: Mr. Moore decides to use a random number generator to select 20 students from the school. Suppose that when choosing 20 students using the random generator on the graphing calculator, Mr. Moore’s sample is all eighth graders. Does that mean the sample is not a random sample? Explain your reasoning.
Mathematics
2 answers:
liubo4ka [24]3 years ago
6 0

A: Suppose Mr. Moore decides to use 20 seventh graders as the sample. Is this sample a random sample? Explain your reasoning.

Ans: No, because he only chose the seventh graders which is invalid since he wants to have to use the mean height which involves the 6th, 7th and 8th graders.

B: Mr. Moore decides to use a random number generator to select 20 students from the school. Suppose that when choosing 20 students using the random generator on the graphing calculator, Mr. Moore’s sample is all eighth graders. Does that mean the sample is not a random sample? Explain your reasoning.

Ans: No, it is still a random sample. Since he is using a random generator, there is a possibility that the random generator would pick all students from the 8th grade. Unlike the first one, the random generator is not biased towards any grade, it is just a coincidence.

Viktor [21]3 years ago
3 0

Answer:

A) That's not a random sample because everyone doesn't have an equal chance of being selected

B) It is a random sample. All from eight grade is just a coincidence (which is very unlikely)

You might be interested in
Andrew washed 32 car windows in 4 hours. At this rate, how many windows did he wash in 8 hours?
Alexus [3.1K]

8 hours is twice as many as 4:

Multiply the number of windows in 4 hours by 2:

32 x 2 = 64 windows in 8 hours

8 0
2 years ago
Read 2 more answers
(gof)(x) = x2 + x + 1
Sever21 [200]

Answer:

the \: answer \: is \: b

Step-by-step explanation:

(gof)x =  {(x + 1)}^{2 }   =  {x}^{2} + 2x + 1

8 0
2 years ago
PLEASE help due today Geometry
irina1246 [14]

\\ \sf\Rrightarrow \dfrac{15}{20}=\dfrac{21}{28}

\\ \sf\Rrightarrow \dfrac{1}{4}=\dfrac{1}{4}

Hence they are similar

#2

  • <A=<H
  • And ratio of sides are same

Hence both triangles are similar by SAS property

#3

\\ \sf\Rrightarrow ∆KDH\sim ∆ABD

8 0
2 years ago
Can you help me with this​
Anit [1.1K]

Answer:

12 only.

Step-by-step explanation:

When the question is asking for f(0), it is asking for the value of <em>y </em>when x = 0.

We see that there is only 1 intersection at x = 0, and the y value would equal 12.

Therefore, our answer is 12 only.

8 0
3 years ago
Read 2 more answers
Use the given x and y values to write a direct variation<br> equation.<br> x = 5, y = 25
Anuta_ua [19.1K]

Answer:

k= 1/5

Step-by-step explanation:

x is proportional to y

x = ky (k is const.)

k = x/y

k= 5/25

k = 1/5

7 0
3 years ago
Read 2 more answers
Other questions:
  • A community is building a square park with sides that measure 145 meters. To separate the picnic area from the play area, the pa
    12·2 answers
  • Sophia bought 2 jars of pickles for $65. What is the unit price?
    12·1 answer
  • Pleas help me !!!!!!!!
    15·2 answers
  • Write the point-slope form of the equation of the line that passes through the points (-8, 2) and (1, -4). Include your work in
    8·1 answer
  • How do you write the equation for intercept (4,-3), m=-1
    8·1 answer
  • MZFEG=6x - 7 and mZFED=2x +41 , find the mZDEG
    15·1 answer
  • 1) MZEHC
    14·1 answer
  • What is the solution to log48x= 3?<br> X=3/8 x=3/2 x=2 x=8
    10·1 answer
  • Jamie had seven posters, but only three could fit on his closet door. How many different ways can he arrange the three posters o
    5·1 answer
  • Cate solved an inequality to find c, the possible number of cats that a shelter can house. She found that c &lt; 28. Which state
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!