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
jeka57 [31]
4 years ago
5

Davina selected 50 people at random and asked them whether they had watched the documentary on Antarctica on television the prev

ious night. She repeated this survey using the same method three more times.
Do any of the surveys appear to be biased?


Watched Antarctica documentary last night? Survey
1 2 3 4
Yes 13 14 35 17
No 37 36 15 13





A.


Yes, because all four surveys do not have identical results.


B.


Yes, because the results from Survey 3 differ significantly from the other surveys’ results.


C.


No, because Davina surveyed the same number of people each of the four times.


D.


No, because all four surveys have about the same number of people saying “yes” and about the same number of people saying “no.”
Mathematics
2 answers:
malfutka [58]4 years ago
5 0
I believe it is c because it is definitly not biased because they were selected at random. And d. Is incorrect
jonny [76]4 years ago
3 0
It's B, I took the test. And saw that was the answer.
You might be interested in
Please help help help help​
amid [387]

Answer:

option b is the correct i mean 10

7 0
3 years ago
Read 2 more answers
Please Complete the page.
Alexxandr [17]
7. -8/3
8. 4/35
9. -21/50
10. 35/64
11.-25/54
6 0
3 years ago
A student raises her grade average from a 75 to a 90. what was the percent of increase in the student's grade average? round you
Leona [35]
Here are some formulas...
percent increase = (new number - original number) / original number...* 100
percent decrease = (original number - new number) / original number...* 100
============
a student raises her grade from a 75 to a 90....since it is going from a smaller number to a larger number, u have an increase
percent increase = (90 - 75) / 70....* 100
                           =   15/70   * 100
                           = 0.2142 * 100
                           = 21.42 rounds to 21.4%  increase
-------------------------
36.50 on sale for 32.12...since it goes from a larger number to a smaller number, u have a decrease
percent decrease = (original number - new number) / original * 100
                             = (36.50 - 32.12) / 32.12...* 100
                             = 4.38 / 32.12...* 100
                             = 0.1363...* 100
                             = 13.63 rounds to 13.6% decrease
------------------------------
23.5 to 21.2......this is a decrease
percent decrease = (original number - new number) / original...* 100
                            = (23.5 - 21.2) / 23.5....* 100
                            = 2.3 / 23.5....* 100
                            = 0.0979 * 100
                            = 9.79 rounds to 9.8% decrease






3 0
3 years ago
Read 2 more answers
How do I find the domain range and function of the graph
Allisa [31]

Answer:

  D = {-3, -2, -1, 1, 4}

  R = {-5, -1, 0, 2}

Step-by-step explanation:

You have correctly described the process of finding the domain and range by the way you filled in the blanks at the top of the sheet.

__

The domain is the set of x-values of the points on the graph:

  D = {-3, -2, -1, 1, 4}

The range is the set of (unique) y-values of the points on the graph:

  R = {-5, -1, 0, 2}

3 0
2 years ago
Are both students earning the same amount of money per hour? Show your work to justify your answer.
krok68 [10]

Answer:

No, Jimmy is earning $5 per hour while Amanda is earning close to $6.66 per hour.

Step-by-step explanation:

Have a nice day/night :)

7 0
3 years ago
Read 2 more answers
Other questions:
  • For each week of work.Aaron gets paid a base amount of $500 plus 25%of his total sales. If y represent his total pay each week a
    13·1 answer
  • The second of two number is 5 times first. Their sum is 42 . Find both numbers
    11·2 answers
  • Kevin made 12 5/6 bags of popcorn for a movie night with some friends. Together they ate 7 1/6 bags of it. How much popcorn was
    10·1 answer
  • Q4. An 8-sided fair die is rolled twice and the product of the two numbers obtained when the die is rolled two times is calculat
    14·1 answer
  • Which algebraic equation models the English sentence, a number subtracted from 8 is equal to 4?
    5·1 answer
  • The temperature of water in the Solar steam power system for time 0 equal to or less than t equal to or less than 10, is modeled
    6·2 answers
  • Please helppp!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    5·1 answer
  • Aldo ls saving money to buy a game. So far he has saved $12, which is one-third of the total cost of the game. How much does the
    14·2 answers
  • Jarred sells DVDs. His inventory shows that he has a total of 3,500 DVDs. He has 2,342 more contemporary titles than classic tit
    7·1 answer
  • What's the value of this python expression: (2**2) == 4?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!