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
NeTakaya
3 years ago
14

The DNR is planning a study to determine whether breakwaters help decrease erosion at a large lake. They divide the shoreline in

to 100-foot plots, installing some with breakwaters and some without. However, the east and west shorelines of this lake receive very different wave patterns due to the wind. The DNR suspects this will affect the responses to the breakwaters. Because of this, the DNR plans to treat each shoreline as a different group. This study is an example of:
(A) An uncontrolled experiment(B) A blocked design experiment.(C) A matched pairs experiment.(D) A stratified random sample(E) A randomized observational study
Mathematics
2 answers:
Vera_Pavlovna [14]3 years ago
6 0

Answer:

(D) A stratified random sample

Step-by-step explanation:

A stratified random samples are samples that involves the use of stratified random sampling (or stratification) which involves the partition or division of a population into smaller subgroups (called strata). The division is done based on some shared characteristics and attributes. The case above is a stratified random sample because it involves the division of shoreline(population) into 100-foot plots(stratas or subgroups).

Triss [41]3 years ago
6 0

Answer:

B

Step-by-step explanation:

You might be interested in
A rectangular wall in Andrew's house has the dimensions shown. If
trasher [3.6K]

Answer:

b. 189 square feet

18 X 12 = 216 square feet

4.5 X 3 = 13.5

13.5 X 2 = 27

216 - 27 = 189 square feet

3 0
2 years ago
If you place $25 per month in a wall safe for 2 years, how much will you save?
Mkey [24]

Answer:

$600...

↓↓↓↓↓

Step-by-step explanation:

25x 24 = 600

6 0
3 years ago
Read 2 more answers
How to find the accurate estimate of the volume?
Daniel [21]
Novels about Harry Potter, a boy who learns on his eleventh birthday that he is the orphaned son of two powerful wizards and possesses unique magical powers of his own. He is summoned from his life as an unwanted child to become a student … More
Releas
5 0
3 years ago
M=-2 (-3,4) how do you write it into slope intercept
Blizzard [7]

Answer:

y = -2x - 2

Plug the x- and y-values into the appropriate spaces in the slope-intercept form and see which value for b would make the equation true:

4 = -2(-3) +/- ?

4 = 6 - 2

4 = 4

I don't know if this makes sense, I'm sorry if it doesn't but the answer is correct because it goes through the point (-3,4)

3 0
3 years ago
Read 2 more answers
(1) Cos AcosecA=cot A​
Mashutka [201]

Answer:

The Basic Identities are :

cosec(A) =  \frac{1}{ \sin(A) }

\tan(A)  =  \frac{ \sin(A) }{ \cos(A) }

\cot(A)  =  \frac{1}{ \tan(A) }  =  \frac{ \cos(A) }{ \sin(A) }

So for this question :

\cos(A)cosec(A) =  \cot(A)

l.s.h =  \cos(A)  \times  \frac{1}{ \sin(A) }

l.s.h =  \frac{ \cos(A) }{ \sin(A) }

l.sh =  \cot(A)  \: (proven)

7 0
3 years ago
Other questions:
  • What is the ratio of tetras to catfishes
    9·2 answers
  • The drama club is selling tickets to their play to raise money for the show's expenses. Each student ticket sells for $8 and eac
    9·2 answers
  • The city zoo had an equal number of visitors on Sat. And Sun. In all they had 32,096 people visited the zoo that weekend
    8·1 answer
  • Having debt keeps you from building wealth
    5·1 answer
  • Please help me quickly, the first person who answers gets brainlest
    11·2 answers
  • 30 out of 40 is equal to what percent
    12·1 answer
  • For the function given​ below, find a formula for the riemann sum obtained by dividing the interval​ [a,b] into n equal subinter
    11·1 answer
  • Giả sử tỷ lẹ bệnh nhân tại 1 thành phố là a%
    5·1 answer
  • Order these numbers from least to greatest.<br> 2.2, 2.1021, 2.104, 2.12
    14·2 answers
  • Sergio has ppp paintings in his art collection. He and other local painting collectors agreed to donate a total of 484848 painti
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!