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
Tresset [83]
2 years ago
5

Heron Island is a coral cay in the Great Barrier Reef. Around Heron Island (and elsewhere in Australia) there are 2 color morphs

of the reef heron, Egretta sacra, a white morph and a dark or blue morph. It is generally accepted that farther north in the southern hemisphere there are many more white than dark morphs, while farther south just the opposite is true. A preliminary study was carried out to test the hypothesis that the ratio of white to dark herons on the island was 3:1.
Required:
a. A small census found 16 white morphs and 4 dark. Can the assumption of a 3:1 ratio be rejected?
b. What if the census were larger with 160 white morphs and 40 dark?
Mathematics
1 answer:
kobusy [5.1K]2 years ago
3 0

In case A, as the error would be a difference of 1, the assumption could be mantained, but in case B the difference will be bigger, showing that the ratio is not 3:1 but 4:1.

<h3><u>Ratios</u></h3>

Given that a preliminary study was carried out to test the hypothesis that the ratio of white to dark herons on the island was 3:1, but A) a small census found 16 white morphs and 4 dark, to determine if the assumption of a 3 :1 ratio could be rejected, and B) to determine the same question if the census were larger with 160 white morphs and 40 dark, the following calculations must be made:

A)

  • 3 + 1 = 4
  • 16 + 4 = 20
  • 4 = 20
  • 3 = X
  • 60 / 4 = X
  • 15 = X
  • Therefore, as the error would be a difference of 1, the assumption could be mantained.

B)

  • 3 + 1 = 4
  • 160 + 40 = 200
  • 150 = 3:1
  • In this case, the difference will be bigger, showing that the ratio is not 3:1 but 4:1.

Learn more about ratios in brainly.com/question/1504221

You might be interested in
The difference of a number x and 5.
DiKsa [7]

Answer:

Below

Step-by-step explanation:

Difference= ‘-’

=

x - 5

3 0
3 years ago
1
Blababa [14]

Answer:

76

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
How can I divide thirty-three into two groups so the ratio is four to seven?
lana [24]
Look at it this way:

-- Since the two groups have the ratio of 4 to 7, then the first group has 4 parts
and the other group has 7 parts.

-- If the first group has 4 parts and the other group has 7 parts, then they have
11 parts all together.

-- Those 11 parts are all parts of 33.  There must be  ( 33 / 11 ) = 3 items in each part.

Now you can go back to the groups . . .

-- The first group has 4 parts. 
With 3 items in each part, that's (4 x 3) = 12 items.

-- The other group has 7 parts.
With 3 items in each part, that's (7 x 3) = 21 items.

8 0
3 years ago
What two numvbets are 7 units away from 0 on a number line
yanalaym [24]
I would guess it would be
7 and -7
5 0
3 years ago
I need help ASAP The angle measures of a triangle are shown in the diagram. 50° les (3x - 10) ° What is the value of x? F25 G 20
insens350 [35]

Answer:

The answer is 28

Step-by-step explanation:

Since the total measurements of triangle corners are equal to 180

Then

2x + 3x - 10 + 50 = 180 \\ 5x - 40 = 180 \\ 5x = 140 \\ x = 28

4 0
2 years ago
Other questions:
  • your distance from lightning varies directly with the time it takesYou to hear thunder. If you hear the thunder 10 seconds after
    8·1 answer
  • In the similar triangles used in indirect measurement with the shadows of a flagpole and a person, which sides of the triangles
    14·1 answer
  • Kenya exchanges $150 for British pounds(£). Suppose the conversion rate is £1 = $1.60. How many pounds should she receive?
    11·2 answers
  • Consider the functions f(x) = 8x + 16 and g(x) = x^2 + 2x + 5.
    10·1 answer
  • Point V lies between points U and W on Line segment U W.
    14·2 answers
  • Find a solution if x=2​
    8·2 answers
  • 5/14 x 7/30 in its simplest form
    9·1 answer
  • How many degrees<br>in 1/20 of a full turn?​
    14·1 answer
  • I NEED HELP ASAP. (WORTH 50 POINTS)
    6·2 answers
  • Two prisms are similar and their ratio of similarity is 3:8.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!