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
DedPeter [7]
2 years ago
9

An ornithologist has 4 bird feeders at separate locations. She wonders if birds are equally likely to visit each of the feeders.

She recorded data for a sample of 300 recent visits. Here are the results:
Feeder 1 2 3 4
Observed visits 60 90 92 58
A test is performed to determine if these results suggest that birds visit one specific feeder more often than the other feeders. What is the xa test statistic?
a. 13.71
b. 0
c. 14.37
d. 3
e. 1028
Mathematics
1 answer:
Marianna [84]2 years ago
7 0

Answer:

the x² test statistic 13.71

Option a) 13.71 is the correct answer.

Step-by-step explanation:

Given the data in the question;

Feeder                     1      2      3       4

Observed visits; o_i  60   90   92    58

data sample = 300

Expected e_i = 300 / 4 = 75

the x² test statistic = ?

X^2_{stat = ∑[ (o_i - e_i)²/e_i]

X^2_{stat = [ (60 - 75)² / 75 ] + [ (90 - 75)² / 75 ] + [ (92 - 75)² / 75 ] + [ (58 - 75)² / 75 ]

X^2_{stat = [ 3 ] + [ 3 ] + [ 3.8533 ] + [ 3.8533 ]

X^2_{stat = 13.7066 ≈ 13.71

Therefore, the x² test statistic 13.71

Option a) 13.71 is the correct answer.

You might be interested in
Graph the line that is parallel to y = 3x - 7 that passes through the point (2, 1)
Misha Larkins [42]

Answer:

y = 3x - 5

y = 3x - 7

y = 3x + b

1 = 3(2) + b

1 = 6 + b

-5 = b

y = 3x - 5

7 0
3 years ago
What is the standard form equation of 4x+7¥=11
yaroslaw [1]

This equation is in standard from unless you mean vertex standard form?  

5 0
2 years ago
What is the value of the function f(x)=4(x-15) evaluated at x=10?
slamgirl [31]
The value of the function is -20
6 0
3 years ago
jack has 6 pounds of candy, he plans on splitting it up equally with his 5 students how many pounds will each student get?
uysha [10]
The answer will be 1.2
3 0
2 years ago
Read 2 more answers
If quadrilateral 1 is reflected across the x-axis and translated 8 units down to form quadrilateral 2, which statement is true?
grigory [225]

Answer:

(A) Quadrilateral 1 is congruent to quadrilateral 2 because the transformations are rigid.

Step-by-step explanation:

This is because since it's only being reflected across the y-axis and translated 8 units down, it's still an isometric.

Isometry or rigid transformation is the opposite of a non-rigid transformation and occurs during translations, reflections and rotations. Non-rigid transformations occur in dilations.

Isometry basically keeps all measure angles and distances of the polygon the same before and after a transformation.

5 0
3 years ago
Other questions:
  • 0.03 x 5=<br><br><br> How is this solved?
    7·2 answers
  • Graph the set of points which model is most appropriate for the set
    12·1 answer
  • What is the fifth term of the arithmetic sequence?
    5·1 answer
  • What is the end behavior of f(x)= -4x^6+6x^2-52
    15·1 answer
  • Given the numbers x = a and y = –b, which statement is true? A. –|x| = a and –|y| = b B. |–x| = –a and |–y| = b C. |x| = –a and
    6·1 answer
  • Write as an expression: Twice the square of the product of x and y
    7·1 answer
  • Solve for x. <br> 2x+20,2x-4
    13·1 answer
  • The publisher chooses to have front and back covers
    6·1 answer
  • Given the points (-10, -3) and (4,8) find the slope.
    5·1 answer
  • John needs to put the set of numbers below in ascending order.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!