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
artcher [175]
3 years ago
8

When studying animal behavior, the distribution of organisms within a choice chamber can be studied to identify animal preferenc

es. 20 Isopods are placed in a 2-choice choice chamber. A cotton ball dampened with distilled water is placed in Chamber A; A dry cotton ball is placed in Chamber B. After 15 minutes 2 Isopods are located in Chamber B, and 18 isopods are found in Chamber A. Perform the chi-squared test to determine if the distribution of isopods is significant or due to random chance.
a) chi-squared is 1.20, no it is not significant
b) chi-squared is 8.42, no its not significant
c) Chi-squared = 12.8, yes it is significant
d) Chi-squared is 18.59, yes it is significant
Biology
1 answer:
Komok [63]3 years ago
4 0

Answer:

c

Explanation:

Random distribution of the Isopods should be 50/50 in A and B.

Chi-square = \frac{(O - E)^2}{E} where O = observed frequency and E = expected frequency

Chamber         O                    E             Chi-square

  A                   18                   10             \frac{(18 - 10)^2}{10} = 6.4

  B                    2                    10             \frac{(2 - 10)^2}{10} = 6.4

<em>Total Chi-square </em>= 6.4 + 6.4 = 12.8

<em>Degree of freedom</em> = 2 - 1 = 1

<em>Tabulated Chi-square</em> (α = 0.05) = 3.8415

The calculated Chi-square exceeds the critical value, hence, it is significant and not due to random.

<em>The correct option is </em><em>c</em><em>.</em>

You might be interested in
A palpable pulse that presents with a chaotic rhythm and no predictable pattern is​ called:
jok3333 [9.3K]
A pulse with unpredictable pattern is termed as an <em />irregularly irregular pulse. This kind of pulse coincides with an irregularly irregular heart rhythm seen in those with severe arrhythmias such as 3rd degree AV block. In contrast, there is a pulse that is irregular but has a predictable pattern termed as regularly irregular.
5 0
3 years ago
Read 2 more answers
1. clumped population dispersal ___ resources
SOVA2 [1]

Answer:

compete

limited growth rate

logistic

Explanation:

8 0
3 years ago
________ is the biological heritage (including physical characteristics such as one's skin color and associated traits) that peo
Whitepunk [10]

Answer: Race

Explanation: Race is a heritage that various and diverse group of people use to identify with each other. Race may include physical characteristics such as the skin color example the black race and other associated traits such as facial features and hair texture

4 0
3 years ago
HEY PLEASE HELP ME ASAP I WILL GIVE YOU BRAINLEST!!!
satela [25.4K]
Okay what u want me to help you with
4 0
3 years ago
Read 2 more answers
Two frog populations (same species) living in two neighboring lakes sing slightly different courtship songs. increased irrigatio
Contact [7]

The best answers for this question would be:

 

 The songs will become more similar to each other.

 

<span>The frogs have most likely sync their songs with each other, since the female cannot determine the range of the song of the male frog given the environment that they are living in.</span>

7 0
3 years ago
Other questions:
  • The life function of transport in an organism directly involves those activities used to
    7·1 answer
  • What is ribose?...................
    11·2 answers
  • If one were to argue that World War II was the most prolific time for agricultural research and development, which of the follow
    8·1 answer
  • When a baby suckles at its mother's breast the stimulus at the breast is sent to the mother's brain (a region called the hypotha
    13·1 answer
  • Vision is to the occipital lobe as _____ is to the _____ lobe.
    11·2 answers
  • While breathing into a plastic bag what happens to the levels of carbon dioxide in your blood?
    6·1 answer
  • Name some bubonic plague
    7·2 answers
  • What do we call molecules that are only<br> made of hydrogen and carbon?
    9·1 answer
  • What causes our seasons?
    9·2 answers
  • ASAP DIS IS LATE PLS ASAP o(≧口≦)o
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!