answer.
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
Tresset [83]
2 years ago
15

Li designed a survey to determine how comfortable students at her middle school are with fractions. There are 600 students in he

r middle school. The students are equally distributed among grade levels. She selected a sample of 28 students in her first-period class. Which best explains Li’s sample?
Mathematics
2 answers:
Dmitry_Shevchenko [17]2 years ago
4 0

The correct answer to this is:

Nonrandom and biased

 

<span>The method of Li’s sampling has a tendency that some elements or portion in the population has no chance of selection. Further, it was not stated which portion of the population she obtained the sample thus we cannot accurately determine the probability of selection. This kind of sampling results in a bias. A biased sampling is a type of nonrandom sampling. </span>

Oxana [17]2 years ago
4 0

Answer:

C for edge users

Step-by-step explanation:

You might be interested in
Use the expression (a+b)(c-d)+9e(a+b)(c−d)+9eleft parenthesis, a, plus, b, right parenthesis, left parenthesis, c, minus, d, rig
jek_recluse [69]

Answer:

Difference: ¨c-d¨ variable: ¨a¨ coefficient: ¨9¨

Step-by-step explanation:

Just trust me bro

8 0
2 years ago
The human resources manager at a company records the length in hours, of one shift at work, X. He creates the probabity
faust18 [17]

Answer:

.84

Step-by-step explanation:

8 0
2 years ago
Which equation represents a linear function on I ready quiz
vitfil [10]

Answer:

Step-by-step explanation:

a function with a graph that is a non-vertical straight line, which can be represented by a linear equation in the form of y = mx + b

3 0
2 years ago
Read 2 more answers
At a college, 69% of the courses have final exams and 42% of courses require research papers. Suppose that 29% of courses have a
laila [671]

Answer:

a) 0.82

b) 0.18

Step-by-step explanation:

We are given that

P(F)=0.69

P(R)=0.42

P(F and R)=0.29.

a)

P(course has a final exam or a research paper)=P(F or R)=?

P(F or R)=P(F)+P(R)- P(F and R)

P(F or R)=0.69+0.42-0.29

P(F or R)=1.11-0.29

P(F or R)=0.82.

Thus, the the probability that a course has a final exam or a research paper is 0.82.

b)

P( NEITHER of two requirements)=P(F' and R')=?

According to De Morgan's law

P(A' and B')=[P(A or B)]'

P(A' and B')=1-P(A or B)

P(A' and B')=1-0.82

P(A' and B')=0.18

Thus, the probability that a course has NEITHER of these two requirements is 0.18.

3 0
2 years ago
What is the iterative rule for the sequence: 13, 10.5, 8, 5.5, 3, 0.5 …?
Allisa [31]
It is -2.5. Each step is 2.5 less
6 0
2 years ago
Read 2 more answers
Other questions:
  • On April 1, 1986, Casey deposited $1150 into a savings account paying 9.6% interest, compounded quarterly. If he hasn't made any
    11·2 answers
  • Jodi is cutting out pieces of paper that measure 8 1/2 inches by 11 inches from a larger sheet of paper that has an area of 1000
    10·1 answer
  • Zöe schedules advertising for a radio station. She must fill 12 minutes each hour with 30 second ads and 60 second ads. Zöe sold
    10·1 answer
  • Which of the following could be the equation for a parabola that opens to the left with vertex (-17,2)?
    14·2 answers
  • Which of the statements about the graph of the function y = 2x are true? Check all of the boxes that apply. The domain is all re
    14·2 answers
  • Sara can run 49 yards in 7 seconds. At that rate, how many feet can she run in 3 minutes?
    8·2 answers
  • You just measured a sugar cube and obtained the following information: mass = 3.48 g height = length = width = 1.3 cm Determine
    6·1 answer
  • There is a mountain with 45 bat caves in a row. Every cave has at least 2 bats and there are 490 bats in all. Any 7 caves in a r
    11·1 answer
  • You can use a bar diagram to help you write the equation of a linear function.
    12·1 answer
  • A sports company wants to package a ball with a 1.5-inch radius in sets of two. They have two options: a cylinder or a square pr
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!